./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:57:33,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:57:33,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:57:33,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:57:33,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:57:33,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:57:33,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:57:33,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:57:33,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:57:33,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:57:33,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:57:33,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:57:33,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:57:33,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:57:33,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:57:33,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:57:33,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:57:33,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:57:33,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:57:33,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:57:33,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:57:33,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:57:33,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:57:33,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:57:33,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:57:33,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:57:33,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:57:33,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:57:33,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:57:33,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:57:33,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:57:33,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:57:33,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:57:33,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:57:33,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:57:33,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:57:33,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:57:33,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:57:33,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:57:33,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:57:33,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:57:33,147 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 04:57:33,181 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:57:33,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:57:33,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:57:33,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:57:33,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:57:33,183 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:57:33,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:57:33,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:57:33,184 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:57:33,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:57:33,185 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:57:33,185 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:57:33,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:57:33,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:57:33,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:57:33,186 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:57:33,186 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:57:33,186 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:57:33,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:57:33,186 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:57:33,187 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:57:33,187 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:57:33,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:57:33,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:57:33,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:57:33,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:57:33,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:57:33,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:57:33,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 04:57:33,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 04:57:33,188 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:57:33,189 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:57:33,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:57:33,189 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:57:33,189 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:57:33,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:57:33,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:57:33,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:57:33,500 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:57:33,501 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:57:33,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-30 04:57:34,762 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:57:34,984 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:57:34,985 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-30 04:57:34,994 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cd3a7a08/c1b5ab8ab34f4cc08a183fb77a70902d/FLAGc69bb739c [2023-08-30 04:57:35,017 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cd3a7a08/c1b5ab8ab34f4cc08a183fb77a70902d [2023-08-30 04:57:35,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:57:35,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:57:35,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:57:35,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:57:35,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:57:35,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:35" (1/1) ... [2023-08-30 04:57:35,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c02901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:35, skipping insertion in model container [2023-08-30 04:57:35,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:35" (1/1) ... [2023-08-30 04:57:35,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:57:35,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:57:35,234 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-30 04:57:35,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:57:35,273 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 04:57:35,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10498564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:35, skipping insertion in model container [2023-08-30 04:57:35,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:57:35,275 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 04:57:35,277 INFO L158 Benchmark]: Toolchain (without parser) took 254.67ms. Allocated memory is still 73.4MB. Free memory was 43.7MB in the beginning and 33.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-08-30 04:57:35,277 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 73.4MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 04:57:35,278 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.26ms. Allocated memory is still 73.4MB. Free memory was 43.5MB in the beginning and 33.9MB in the end (delta: 9.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-08-30 04:57:35,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 73.4MB. Free memory is still 49.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.26ms. Allocated memory is still 73.4MB. Free memory was 43.5MB in the beginning and 33.9MB in the end (delta: 9.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 04:57:36,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 04:57:36,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 04:57:37,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 04:57:37,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 04:57:37,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 04:57:37,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 04:57:37,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 04:57:37,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 04:57:37,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 04:57:37,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 04:57:37,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 04:57:37,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 04:57:37,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 04:57:37,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 04:57:37,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 04:57:37,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 04:57:37,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 04:57:37,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 04:57:37,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 04:57:37,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 04:57:37,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 04:57:37,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 04:57:37,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 04:57:37,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 04:57:37,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 04:57:37,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 04:57:37,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 04:57:37,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 04:57:37,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 04:57:37,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 04:57:37,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 04:57:37,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 04:57:37,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 04:57:37,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 04:57:37,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 04:57:37,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 04:57:37,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 04:57:37,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 04:57:37,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 04:57:37,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 04:57:37,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 04:57:37,134 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 04:57:37,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 04:57:37,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 04:57:37,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 04:57:37,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 04:57:37,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 04:57:37,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 04:57:37,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 04:57:37,137 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 04:57:37,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 04:57:37,138 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 04:57:37,138 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 04:57:37,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 04:57:37,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 04:57:37,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 04:57:37,138 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 04:57:37,139 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 04:57:37,139 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 04:57:37,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 04:57:37,139 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 04:57:37,139 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 04:57:37,139 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 04:57:37,140 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 04:57:37,140 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 04:57:37,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 04:57:37,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 04:57:37,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 04:57:37,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:57:37,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 04:57:37,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 04:57:37,141 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 04:57:37,141 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 04:57:37,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 04:57:37,142 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 04:57:37,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 04:57:37,142 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 04:57:37,142 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 04:57:37,142 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 04:57:37,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 04:57:37,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 04:57:37,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 04:57:37,459 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 04:57:37,460 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 04:57:37,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-30 04:57:38,544 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 04:57:38,782 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 04:57:38,783 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-30 04:57:38,788 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea0618ff/60d548eb25a54767928b20966dcbb40a/FLAGaa8697a81 [2023-08-30 04:57:38,803 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ea0618ff/60d548eb25a54767928b20966dcbb40a [2023-08-30 04:57:38,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 04:57:38,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 04:57:38,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 04:57:38,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 04:57:38,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 04:57:38,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:38" (1/1) ... [2023-08-30 04:57:38,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9a1c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:38, skipping insertion in model container [2023-08-30 04:57:38,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:38" (1/1) ... [2023-08-30 04:57:38,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 04:57:38,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:57:38,997 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-30 04:57:39,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:57:39,032 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 04:57:39,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 04:57:39,066 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-30 04:57:39,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:57:39,086 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 04:57:39,118 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-30 04:57:39,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 04:57:39,149 INFO L208 MainTranslator]: Completed translation [2023-08-30 04:57:39,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39 WrapperNode [2023-08-30 04:57:39,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 04:57:39,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 04:57:39,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 04:57:39,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 04:57:39,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,207 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 271 [2023-08-30 04:57:39,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 04:57:39,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 04:57:39,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 04:57:39,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 04:57:39,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,259 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 04:57:39,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 04:57:39,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 04:57:39,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 04:57:39,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (1/1) ... [2023-08-30 04:57:39,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 04:57:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 04:57:39,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 04:57:39,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 04:57:39,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 04:57:39,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 04:57:39,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 04:57:39,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 04:57:39,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 04:57:39,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 04:57:39,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 04:57:39,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 04:57:39,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 04:57:39,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 04:57:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 04:57:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 04:57:39,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 04:57:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 04:57:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 04:57:39,349 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 04:57:39,470 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 04:57:39,471 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 04:57:40,118 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 04:57:40,128 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 04:57:40,128 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-30 04:57:40,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:57:40 BoogieIcfgContainer [2023-08-30 04:57:40,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 04:57:40,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 04:57:40,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 04:57:40,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 04:57:40,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:57:38" (1/3) ... [2023-08-30 04:57:40,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e3a97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:57:40, skipping insertion in model container [2023-08-30 04:57:40,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:39" (2/3) ... [2023-08-30 04:57:40,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e3a97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:57:40, skipping insertion in model container [2023-08-30 04:57:40,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:57:40" (3/3) ... [2023-08-30 04:57:40,137 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-08-30 04:57:40,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 04:57:40,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-08-30 04:57:40,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 04:57:40,275 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 04:57:40,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 346 transitions, 716 flow [2023-08-30 04:57:40,408 INFO L130 PetriNetUnfolder]: 28/343 cut-off events. [2023-08-30 04:57:40,409 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:57:40,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 343 events. 28/343 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 662 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-08-30 04:57:40,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 346 transitions, 716 flow [2023-08-30 04:57:40,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 339 transitions, 696 flow [2023-08-30 04:57:40,427 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 04:57:40,434 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 339 transitions, 696 flow [2023-08-30 04:57:40,436 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 339 transitions, 696 flow [2023-08-30 04:57:40,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 339 transitions, 696 flow [2023-08-30 04:57:40,500 INFO L130 PetriNetUnfolder]: 28/339 cut-off events. [2023-08-30 04:57:40,500 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 04:57:40,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 339 events. 28/339 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 663 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 260. Up to 2 conditions per place. [2023-08-30 04:57:40,511 INFO L119 LiptonReduction]: Number of co-enabled transitions 19008 [2023-08-30 04:58:05,255 INFO L134 LiptonReduction]: Checked pairs total: 20431 [2023-08-30 04:58:05,255 INFO L136 LiptonReduction]: Total number of compositions: 398 [2023-08-30 04:58:05,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 04:58:05,273 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5be3baf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 04:58:05,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-30 04:58:05,276 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 04:58:05,276 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 04:58:05,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:05,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:58:05,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:58:05,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash 44154, now seen corresponding path program 1 times [2023-08-30 04:58:05,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:05,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492312474] [2023-08-30 04:58:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:05,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:05,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:05,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:05,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 04:58:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 04:58:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:05,617 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 04:58:05,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 04:58:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:05,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:05,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:05,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492312474] [2023-08-30 04:58:05,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492312474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:05,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:05,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:58:05,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834008094] [2023-08-30 04:58:05,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:05,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:58:05,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:58:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:58:05,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-30 04:58:05,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:05,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:05,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-30 04:58:05,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:08,206 INFO L130 PetriNetUnfolder]: 11903/16592 cut-off events. [2023-08-30 04:58:08,206 INFO L131 PetriNetUnfolder]: For 444/444 co-relation queries the response was YES. [2023-08-30 04:58:08,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33609 conditions, 16592 events. 11903/16592 cut-off events. For 444/444 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 91362 event pairs, 10226 based on Foata normal form. 0/5881 useless extension candidates. Maximal degree in co-relation 15248. Up to 8299 conditions per place. [2023-08-30 04:58:08,306 INFO L137 encePairwiseOnDemand]: 733/744 looper letters, 110 selfloop transitions, 6 changer transitions 0/116 dead transitions. [2023-08-30 04:58:08,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 116 transitions, 500 flow [2023-08-30 04:58:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:58:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:58:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1020 transitions. [2023-08-30 04:58:08,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45698924731182794 [2023-08-30 04:58:08,322 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1020 transitions. [2023-08-30 04:58:08,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1020 transitions. [2023-08-30 04:58:08,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:08,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1020 transitions. [2023-08-30 04:58:08,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,343 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 142 flow. Second operand 3 states and 1020 transitions. [2023-08-30 04:58:08,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 116 transitions, 500 flow [2023-08-30 04:58:08,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 116 transitions, 476 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 04:58:08,354 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 176 flow [2023-08-30 04:58:08,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-08-30 04:58:08,359 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-08-30 04:58:08,359 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 176 flow [2023-08-30 04:58:08,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:08,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 04:58:08,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 04:58:08,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:08,571 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:58:08,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:08,571 INFO L85 PathProgramCache]: Analyzing trace with hash 44153, now seen corresponding path program 1 times [2023-08-30 04:58:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020868748] [2023-08-30 04:58:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:08,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:08,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:08,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:08,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 04:58:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:08,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 04:58:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:08,713 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:58:08,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 04:58:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:08,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:08,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020868748] [2023-08-30 04:58:08,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020868748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:08,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:08,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 04:58:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170515800] [2023-08-30 04:58:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:08,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:58:08,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:08,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:58:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:58:08,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 744 [2023-08-30 04:58:08,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:08,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:08,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 744 [2023-08-30 04:58:08,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:10,731 INFO L130 PetriNetUnfolder]: 11903/16586 cut-off events. [2023-08-30 04:58:10,732 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2023-08-30 04:58:10,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33342 conditions, 16586 events. 11903/16586 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 92068 event pairs, 10226 based on Foata normal form. 4/5891 useless extension candidates. Maximal degree in co-relation 16651. Up to 16586 conditions per place. [2023-08-30 04:58:10,807 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-30 04:58:10,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 294 flow [2023-08-30 04:58:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:58:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:58:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 966 transitions. [2023-08-30 04:58:10,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327956989247312 [2023-08-30 04:58:10,812 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 966 transitions. [2023-08-30 04:58:10,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 966 transitions. [2023-08-30 04:58:10,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:10,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 966 transitions. [2023-08-30 04:58:10,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.0) internal successors, (966), 3 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:10,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:10,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:10,821 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 176 flow. Second operand 3 states and 966 transitions. [2023-08-30 04:58:10,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 294 flow [2023-08-30 04:58:10,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:58:10,824 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 160 flow [2023-08-30 04:58:10,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-08-30 04:58:10,825 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-08-30 04:58:10,826 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 160 flow [2023-08-30 04:58:10,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:10,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:10,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 04:58:10,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:11,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:11,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:58:11,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:11,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1373062, now seen corresponding path program 1 times [2023-08-30 04:58:11,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:11,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295995623] [2023-08-30 04:58:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:11,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:11,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:11,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:11,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 04:58:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:58:11,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:11,189 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 04:58:11,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 04:58:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:11,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:11,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:11,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295995623] [2023-08-30 04:58:11,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295995623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:11,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:11,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 04:58:11,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451668087] [2023-08-30 04:58:11,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:11,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 04:58:11,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:11,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 04:58:11,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 04:58:12,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-08-30 04:58:12,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:12,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:12,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-08-30 04:58:12,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:18,449 INFO L130 PetriNetUnfolder]: 29756/41459 cut-off events. [2023-08-30 04:58:18,449 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2023-08-30 04:58:18,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83317 conditions, 41459 events. 29756/41459 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 2429. Compared 256414 event pairs, 25565 based on Foata normal form. 0/14706 useless extension candidates. Maximal degree in co-relation 83309. Up to 8297 conditions per place. [2023-08-30 04:58:18,651 INFO L137 encePairwiseOnDemand]: 735/744 looper letters, 248 selfloop transitions, 21 changer transitions 0/269 dead transitions. [2023-08-30 04:58:18,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 269 transitions, 1166 flow [2023-08-30 04:58:18,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 04:58:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 04:58:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2036 transitions. [2023-08-30 04:58:18,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560931899641577 [2023-08-30 04:58:18,658 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2036 transitions. [2023-08-30 04:58:18,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2036 transitions. [2023-08-30 04:58:18,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:18,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2036 transitions. [2023-08-30 04:58:18,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 339.3333333333333) internal successors, (2036), 6 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:18,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:18,673 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:18,673 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 160 flow. Second operand 6 states and 2036 transitions. [2023-08-30 04:58:18,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 269 transitions, 1166 flow [2023-08-30 04:58:18,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 269 transitions, 1165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:58:18,678 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 309 flow [2023-08-30 04:58:18,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-08-30 04:58:18,679 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-30 04:58:18,679 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 309 flow [2023-08-30 04:58:18,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:18,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:18,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 04:58:18,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:18,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:18,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:58:18,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:18,891 INFO L85 PathProgramCache]: Analyzing trace with hash 42612021, now seen corresponding path program 1 times [2023-08-30 04:58:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:18,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648075153] [2023-08-30 04:58:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:58:18,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:18,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:18,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 04:58:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:58:18,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 04:58:18,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:18,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:58:18,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:18,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648075153] [2023-08-30 04:58:18,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648075153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:58:18,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:58:18,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:58:18,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412798252] [2023-08-30 04:58:18,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:58:18,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 04:58:18,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:18,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 04:58:18,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 04:58:19,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-08-30 04:58:19,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:19,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:19,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-08-30 04:58:19,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:21,933 INFO L130 PetriNetUnfolder]: 23805/33171 cut-off events. [2023-08-30 04:58:21,933 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2023-08-30 04:58:21,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 33171 events. 23805/33171 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 200889 event pairs, 20452 based on Foata normal form. 3/11778 useless extension candidates. Maximal degree in co-relation 66705. Up to 33163 conditions per place. [2023-08-30 04:58:22,289 INFO L137 encePairwiseOnDemand]: 735/744 looper letters, 63 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2023-08-30 04:58:22,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 451 flow [2023-08-30 04:58:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:58:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:58:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-08-30 04:58:22,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390681003584229 [2023-08-30 04:58:22,293 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-08-30 04:58:22,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-08-30 04:58:22,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:58:22,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-08-30 04:58:22,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:22,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:22,301 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:22,302 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 309 flow. Second operand 3 states and 980 transitions. [2023-08-30 04:58:22,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 451 flow [2023-08-30 04:58:22,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 421 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-30 04:58:22,308 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 313 flow [2023-08-30 04:58:22,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2023-08-30 04:58:22,309 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-30 04:58:22,310 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 313 flow [2023-08-30 04:58:22,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:22,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:58:22,311 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 04:58:22,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-08-30 04:58:22,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:22,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:58:22,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:58:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2040524934, now seen corresponding path program 2 times [2023-08-30 04:58:22,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:58:22,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099351356] [2023-08-30 04:58:22,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 04:58:22,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:58:22,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:58:22,523 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:58:22,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 04:58:22,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 04:58:22,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:58:22,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 04:58:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:58:22,701 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 04:58:22,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 04:58:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:22,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:58:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 04:58:23,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:58:23,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099351356] [2023-08-30 04:58:23,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099351356] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:58:23,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:58:23,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 04:58:23,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391738754] [2023-08-30 04:58:23,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:58:23,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 04:58:23,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:58:23,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 04:58:23,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 04:58:27,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 744 [2023-08-30 04:58:27,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 288.0) internal successors, (3456), 12 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:58:27,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:58:27,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 744 [2023-08-30 04:58:27,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:58:30,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:32,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:33,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:35,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:36,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:38,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:40,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:43,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:44,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:46,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:48,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:50,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:52,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:54,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:56,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:58:57,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 04:59:05,051 INFO L130 PetriNetUnfolder]: 29761/41486 cut-off events. [2023-08-30 04:59:05,051 INFO L131 PetriNetUnfolder]: For 333/333 co-relation queries the response was YES. [2023-08-30 04:59:05,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83491 conditions, 41486 events. 29761/41486 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 251519 event pairs, 25565 based on Foata normal form. 26/14770 useless extension candidates. Maximal degree in co-relation 83477. Up to 8292 conditions per place. [2023-08-30 04:59:05,276 INFO L137 encePairwiseOnDemand]: 732/744 looper letters, 244 selfloop transitions, 52 changer transitions 0/296 dead transitions. [2023-08-30 04:59:05,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 296 transitions, 1523 flow [2023-08-30 04:59:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 04:59:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 04:59:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5209 transitions. [2023-08-30 04:59:05,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118437697659709 [2023-08-30 04:59:05,292 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5209 transitions. [2023-08-30 04:59:05,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5209 transitions. [2023-08-30 04:59:05,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:05,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5209 transitions. [2023-08-30 04:59:05,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 306.4117647058824) internal successors, (5209), 17 states have internal predecessors, (5209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:05,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 744.0) internal successors, (13392), 18 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:05,327 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 744.0) internal successors, (13392), 18 states have internal predecessors, (13392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:05,327 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 313 flow. Second operand 17 states and 5209 transitions. [2023-08-30 04:59:05,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 296 transitions, 1523 flow [2023-08-30 04:59:05,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 296 transitions, 1491 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:59:05,333 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 713 flow [2023-08-30 04:59:05,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=713, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2023-08-30 04:59:05,334 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 30 predicate places. [2023-08-30 04:59:05,334 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 713 flow [2023-08-30 04:59:05,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 288.0) internal successors, (3456), 12 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:05,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:05,336 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 04:59:05,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:05,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:05,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:05,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2057655290, now seen corresponding path program 3 times [2023-08-30 04:59:05,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:05,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827901178] [2023-08-30 04:59:05,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 04:59:05,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:05,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:05,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 04:59:05,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 04:59:05,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 04:59:05,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 04:59:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:59:05,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:59:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 04:59:06,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:06,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827901178] [2023-08-30 04:59:06,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827901178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:59:06,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:59:06,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 04:59:06,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182586440] [2023-08-30 04:59:06,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:59:06,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 04:59:06,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 04:59:06,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 04:59:07,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-30 04:59:07,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 713 flow. Second operand has 14 states, 14 states have (on average 300.14285714285717) internal successors, (4202), 14 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:07,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:07,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-30 04:59:07,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:08,992 INFO L130 PetriNetUnfolder]: 5949/8304 cut-off events. [2023-08-30 04:59:08,992 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 04:59:09,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16796 conditions, 8304 events. 5949/8304 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41425 event pairs, 5113 based on Foata normal form. 3/2959 useless extension candidates. Maximal degree in co-relation 16775. Up to 8289 conditions per place. [2023-08-30 04:59:09,023 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2023-08-30 04:59:09,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 66 transitions, 457 flow [2023-08-30 04:59:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 04:59:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 04:59:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2461 transitions. [2023-08-30 04:59:09,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134744623655914 [2023-08-30 04:59:09,030 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2461 transitions. [2023-08-30 04:59:09,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2461 transitions. [2023-08-30 04:59:09,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:09,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2461 transitions. [2023-08-30 04:59:09,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 307.625) internal successors, (2461), 8 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:09,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:09,045 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:09,046 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 713 flow. Second operand 8 states and 2461 transitions. [2023-08-30 04:59:09,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 66 transitions, 457 flow [2023-08-30 04:59:09,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 366 flow, removed 15 selfloop flow, removed 14 redundant places. [2023-08-30 04:59:09,049 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 270 flow [2023-08-30 04:59:09,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-08-30 04:59:09,050 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-08-30 04:59:09,050 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 270 flow [2023-08-30 04:59:09,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 300.14285714285717) internal successors, (4202), 14 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:09,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:09,052 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-30 04:59:09,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:09,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:09,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:09,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:09,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1279646817, now seen corresponding path program 1 times [2023-08-30 04:59:09,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:09,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313578171] [2023-08-30 04:59:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:09,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:09,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:09,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:09,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 04:59:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:59:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:09,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:09,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:09,774 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2023-08-30 04:59:09,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2023-08-30 04:59:09,803 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-30 04:59:09,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-08-30 04:59:09,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:09,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:59:10,052 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:59:10,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-30 04:59:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:10,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:10,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313578171] [2023-08-30 04:59:10,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313578171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:10,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:10,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:59:10,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465591648] [2023-08-30 04:59:10,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:10,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:59:10,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:10,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:59:10,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:59:11,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-08-30 04:59:11,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:11,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:11,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-08-30 04:59:11,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:11,953 INFO L130 PetriNetUnfolder]: 4605/6511 cut-off events. [2023-08-30 04:59:11,954 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 04:59:11,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13170 conditions, 6511 events. 4605/6511 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 31785 event pairs, 3945 based on Foata normal form. 0/2492 useless extension candidates. Maximal degree in co-relation 13157. Up to 6511 conditions per place. [2023-08-30 04:59:12,107 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-30 04:59:12,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 384 flow [2023-08-30 04:59:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:59:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:59:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2023-08-30 04:59:12,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4368279569892473 [2023-08-30 04:59:12,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2023-08-30 04:59:12,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2023-08-30 04:59:12,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:12,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2023-08-30 04:59:12,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:12,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:12,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:12,117 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 270 flow. Second operand 3 states and 975 transitions. [2023-08-30 04:59:12,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 384 flow [2023-08-30 04:59:12,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 348 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 04:59:12,121 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 222 flow [2023-08-30 04:59:12,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-08-30 04:59:12,123 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-30 04:59:12,124 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 222 flow [2023-08-30 04:59:12,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.4) internal successors, (1542), 5 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:12,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:12,125 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2023-08-30 04:59:12,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:12,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:12,333 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:12,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1279646816, now seen corresponding path program 1 times [2023-08-30 04:59:12,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:12,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484828808] [2023-08-30 04:59:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:12,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:12,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:12,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:12,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 04:59:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 04:59:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:12,737 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2023-08-30 04:59:12,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-08-30 04:59:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:13,168 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-30 04:59:13,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2023-08-30 04:59:13,798 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-30 04:59:13,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2023-08-30 04:59:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:14,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:14,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484828808] [2023-08-30 04:59:14,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484828808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:14,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:14,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:59:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760082544] [2023-08-30 04:59:14,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:14,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:59:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:59:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:59:15,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 744 [2023-08-30 04:59:15,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 310.75) internal successors, (1243), 4 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:15,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:15,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 744 [2023-08-30 04:59:15,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:16,015 INFO L130 PetriNetUnfolder]: 3261/4718 cut-off events. [2023-08-30 04:59:16,015 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 04:59:16,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 4718 events. 3261/4718 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 22555 event pairs, 2777 based on Foata normal form. 0/2028 useless extension candidates. Maximal degree in co-relation 9549. Up to 4718 conditions per place. [2023-08-30 04:59:16,033 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 61 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-30 04:59:16,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 332 flow [2023-08-30 04:59:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:59:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:59:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2023-08-30 04:59:16,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43862007168458783 [2023-08-30 04:59:16,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2023-08-30 04:59:16,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2023-08-30 04:59:16,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:16,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2023-08-30 04:59:16,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:16,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:16,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:16,042 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 222 flow. Second operand 3 states and 979 transitions. [2023-08-30 04:59:16,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 332 flow [2023-08-30 04:59:16,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:59:16,045 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 209 flow [2023-08-30 04:59:16,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-08-30 04:59:16,045 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-30 04:59:16,046 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 209 flow [2023-08-30 04:59:16,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 310.75) internal successors, (1243), 4 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:16,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:16,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:16,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:16,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:16,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1379914459, now seen corresponding path program 1 times [2023-08-30 04:59:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459798803] [2023-08-30 04:59:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:16,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:16,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:16,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:16,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 04:59:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:16,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 04:59:16,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:16,741 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2023-08-30 04:59:16,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2023-08-30 04:59:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:16,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:59:17,089 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:59:17,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:59:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:17,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:17,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:17,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459798803] [2023-08-30 04:59:17,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459798803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:17,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:17,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:59:17,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48419177] [2023-08-30 04:59:17,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:17,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:59:17,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:59:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:59:17,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 744 [2023-08-30 04:59:17,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:17,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:17,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 744 [2023-08-30 04:59:17,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:18,118 INFO L130 PetriNetUnfolder]: 3141/4534 cut-off events. [2023-08-30 04:59:18,118 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 04:59:18,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9195 conditions, 4534 events. 3141/4534 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 21472 event pairs, 2673 based on Foata normal form. 0/1988 useless extension candidates. Maximal degree in co-relation 9182. Up to 4534 conditions per place. [2023-08-30 04:59:18,134 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 59 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-30 04:59:18,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 325 flow [2023-08-30 04:59:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:59:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:59:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 977 transitions. [2023-08-30 04:59:18,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43772401433691754 [2023-08-30 04:59:18,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 977 transitions. [2023-08-30 04:59:18,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 977 transitions. [2023-08-30 04:59:18,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:18,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 977 transitions. [2023-08-30 04:59:18,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.6666666666667) internal successors, (977), 3 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:18,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:18,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:18,141 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 209 flow. Second operand 3 states and 977 transitions. [2023-08-30 04:59:18,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 325 flow [2023-08-30 04:59:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:59:18,143 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 206 flow [2023-08-30 04:59:18,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-08-30 04:59:18,144 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-30 04:59:18,144 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 206 flow [2023-08-30 04:59:18,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 311.25) internal successors, (1245), 4 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:18,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:18,144 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:18,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:18,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:18,357 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:18,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1379914460, now seen corresponding path program 1 times [2023-08-30 04:59:18,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:18,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377743979] [2023-08-30 04:59:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:18,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:18,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:18,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:18,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 04:59:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:59:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:18,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:18,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:18,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:18,782 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:59:18,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 04:59:18,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 04:59:18,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:18,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:59:19,039 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:59:19,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-30 04:59:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:19,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:19,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:19,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377743979] [2023-08-30 04:59:19,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377743979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:19,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:19,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:59:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394895028] [2023-08-30 04:59:19,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:19,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:59:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:59:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:59:19,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-08-30 04:59:19,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:19,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:19,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-08-30 04:59:19,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:20,472 INFO L130 PetriNetUnfolder]: 3021/4350 cut-off events. [2023-08-30 04:59:20,473 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-30 04:59:20,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8828 conditions, 4350 events. 3021/4350 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 20502 event pairs, 2569 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 8815. Up to 4350 conditions per place. [2023-08-30 04:59:20,488 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 04:59:20,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 318 flow [2023-08-30 04:59:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:59:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:59:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 969 transitions. [2023-08-30 04:59:20,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43413978494623656 [2023-08-30 04:59:20,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 969 transitions. [2023-08-30 04:59:20,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 969 transitions. [2023-08-30 04:59:20,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:20,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 969 transitions. [2023-08-30 04:59:20,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:20,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:20,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:20,495 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 206 flow. Second operand 3 states and 969 transitions. [2023-08-30 04:59:20,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 318 flow [2023-08-30 04:59:20,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:59:20,497 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 203 flow [2023-08-30 04:59:20,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-08-30 04:59:20,498 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-30 04:59:20,498 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 203 flow [2023-08-30 04:59:20,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:20,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:20,499 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:20,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:20,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:20,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash 172327785, now seen corresponding path program 1 times [2023-08-30 04:59:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379508999] [2023-08-30 04:59:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:20,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:20,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:20,715 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:20,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 04:59:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 04:59:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:21,108 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:59:21,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 04:59:21,144 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 04:59:21,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 04:59:21,173 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-30 04:59:21,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:59:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:21,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:21,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:21,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379508999] [2023-08-30 04:59:21,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379508999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:21,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:21,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 04:59:21,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466066113] [2023-08-30 04:59:21,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:21,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:59:21,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:21,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:59:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:59:21,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-08-30 04:59:21,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:21,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:21,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-08-30 04:59:21,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:21,924 INFO L130 PetriNetUnfolder]: 2359/3410 cut-off events. [2023-08-30 04:59:21,924 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2023-08-30 04:59:21,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6940 conditions, 3410 events. 2359/3410 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 15335 event pairs, 1973 based on Foata normal form. 0/1618 useless extension candidates. Maximal degree in co-relation 6927. Up to 3404 conditions per place. [2023-08-30 04:59:21,939 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 54 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-30 04:59:21,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 311 flow [2023-08-30 04:59:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:59:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:59:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1230 transitions. [2023-08-30 04:59:21,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41330645161290325 [2023-08-30 04:59:21,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1230 transitions. [2023-08-30 04:59:21,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1230 transitions. [2023-08-30 04:59:21,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:21,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1230 transitions. [2023-08-30 04:59:21,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 307.5) internal successors, (1230), 4 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:21,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:21,947 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:21,947 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 203 flow. Second operand 4 states and 1230 transitions. [2023-08-30 04:59:21,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 311 flow [2023-08-30 04:59:21,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:59:21,949 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 202 flow [2023-08-30 04:59:21,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-08-30 04:59:21,950 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-30 04:59:21,950 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 202 flow [2023-08-30 04:59:21,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:21,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:21,950 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:21,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:22,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:22,164 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:22,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash 172327851, now seen corresponding path program 1 times [2023-08-30 04:59:22,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:22,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981259062] [2023-08-30 04:59:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:22,166 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:22,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 04:59:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:22,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 04:59:22,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:22,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 04:59:22,522 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 04:59:22,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 04:59:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:22,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:22,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:22,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981259062] [2023-08-30 04:59:22,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981259062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:22,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:22,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:59:22,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479859236] [2023-08-30 04:59:22,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:22,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 04:59:22,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:22,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 04:59:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 04:59:22,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-08-30 04:59:22,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:22,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:22,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-08-30 04:59:22,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:23,129 INFO L130 PetriNetUnfolder]: 1801/2614 cut-off events. [2023-08-30 04:59:23,129 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-30 04:59:23,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5335 conditions, 2614 events. 1801/2614 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 11123 event pairs, 1477 based on Foata normal form. 0/1336 useless extension candidates. Maximal degree in co-relation 5322. Up to 2602 conditions per place. [2023-08-30 04:59:23,139 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-30 04:59:23,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 54 transitions, 306 flow [2023-08-30 04:59:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 04:59:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 04:59:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1228 transitions. [2023-08-30 04:59:23,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263440860215056 [2023-08-30 04:59:23,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1228 transitions. [2023-08-30 04:59:23,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1228 transitions. [2023-08-30 04:59:23,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:23,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1228 transitions. [2023-08-30 04:59:23,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:23,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:23,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:23,146 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 202 flow. Second operand 4 states and 1228 transitions. [2023-08-30 04:59:23,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 54 transitions, 306 flow [2023-08-30 04:59:23,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:59:23,148 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 199 flow [2023-08-30 04:59:23,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-08-30 04:59:23,149 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-30 04:59:23,149 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 199 flow [2023-08-30 04:59:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:23,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:23,150 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:23,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:23,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:23,364 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:23,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash 172327786, now seen corresponding path program 1 times [2023-08-30 04:59:23,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:23,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162632178] [2023-08-30 04:59:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:23,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:23,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:23,366 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:23,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 04:59:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:23,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:59:23,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:23,788 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 04:59:23,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 04:59:23,864 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:59:23,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 04:59:23,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:23,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:59:23,958 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:59:23,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:59:24,007 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 04:59:24,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:59:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:24,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:24,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:24,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162632178] [2023-08-30 04:59:24,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162632178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:24,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:24,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:59:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641677488] [2023-08-30 04:59:24,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:24,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:59:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:59:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:59:24,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-08-30 04:59:24,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:24,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:24,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-08-30 04:59:24,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:25,244 INFO L130 PetriNetUnfolder]: 3065/4444 cut-off events. [2023-08-30 04:59:25,244 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-30 04:59:25,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9028 conditions, 4444 events. 3065/4444 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22214 event pairs, 1477 based on Foata normal form. 0/2270 useless extension candidates. Maximal degree in co-relation 9015. Up to 2608 conditions per place. [2023-08-30 04:59:25,265 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 04:59:25,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 440 flow [2023-08-30 04:59:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:59:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:59:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1545 transitions. [2023-08-30 04:59:25,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2023-08-30 04:59:25,269 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1545 transitions. [2023-08-30 04:59:25,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1545 transitions. [2023-08-30 04:59:25,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:25,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1545 transitions. [2023-08-30 04:59:25,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 309.0) internal successors, (1545), 5 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:25,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:25,274 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:25,275 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 199 flow. Second operand 5 states and 1545 transitions. [2023-08-30 04:59:25,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 440 flow [2023-08-30 04:59:25,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 04:59:25,277 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 212 flow [2023-08-30 04:59:25,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-08-30 04:59:25,277 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-30 04:59:25,278 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 212 flow [2023-08-30 04:59:25,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:25,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:25,278 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:25,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:25,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:25,479 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:25,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash 172327850, now seen corresponding path program 1 times [2023-08-30 04:59:25,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:25,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880816962] [2023-08-30 04:59:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:25,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:25,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:25,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:25,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 04:59:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 04:59:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:25,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 04:59:25,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 04:59:25,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:25,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:59:25,949 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:59:25,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:59:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:25,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:25,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880816962] [2023-08-30 04:59:25,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880816962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:25,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:25,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 04:59:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058746792] [2023-08-30 04:59:25,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:25,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:59:25,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:25,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:59:25,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:59:26,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-08-30 04:59:26,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:26,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:26,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-08-30 04:59:26,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:27,029 INFO L130 PetriNetUnfolder]: 2797/4062 cut-off events. [2023-08-30 04:59:27,029 INFO L131 PetriNetUnfolder]: For 571/571 co-relation queries the response was YES. [2023-08-30 04:59:27,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8828 conditions, 4062 events. 2797/4062 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19820 event pairs, 1477 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 8814. Up to 2602 conditions per place. [2023-08-30 04:59:27,046 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-30 04:59:27,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 447 flow [2023-08-30 04:59:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 04:59:27,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 04:59:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1544 transitions. [2023-08-30 04:59:27,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150537634408602 [2023-08-30 04:59:27,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1544 transitions. [2023-08-30 04:59:27,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1544 transitions. [2023-08-30 04:59:27,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:27,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1544 transitions. [2023-08-30 04:59:27,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 308.8) internal successors, (1544), 5 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:27,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:27,054 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:27,054 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 212 flow. Second operand 5 states and 1544 transitions. [2023-08-30 04:59:27,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 447 flow [2023-08-30 04:59:27,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 04:59:27,056 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 218 flow [2023-08-30 04:59:27,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2023-08-30 04:59:27,057 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2023-08-30 04:59:27,057 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 218 flow [2023-08-30 04:59:27,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:27,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:27,057 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:27,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:27,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:27,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:27,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1047128380, now seen corresponding path program 1 times [2023-08-30 04:59:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428623176] [2023-08-30 04:59:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:27,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:27,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:27,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:27,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 04:59:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:27,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:59:27,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:27,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:27,774 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-30 04:59:27,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-30 04:59:27,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-30 04:59:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:27,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:59:27,941 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 04:59:27,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-08-30 04:59:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:28,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:28,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:28,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428623176] [2023-08-30 04:59:28,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428623176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:28,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:28,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:59:28,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058925325] [2023-08-30 04:59:28,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:28,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:59:28,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:59:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:59:28,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-08-30 04:59:28,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 307.2) internal successors, (1536), 5 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:28,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:28,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-08-30 04:59:28,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:29,319 INFO L130 PetriNetUnfolder]: 2659/3849 cut-off events. [2023-08-30 04:59:29,319 INFO L131 PetriNetUnfolder]: For 1345/1345 co-relation queries the response was YES. [2023-08-30 04:59:29,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8689 conditions, 3849 events. 2659/3849 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17507 event pairs, 2233 based on Foata normal form. 0/2284 useless extension candidates. Maximal degree in co-relation 8674. Up to 3849 conditions per place. [2023-08-30 04:59:29,335 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-30 04:59:29,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 53 transitions, 320 flow [2023-08-30 04:59:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:59:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:59:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-08-30 04:59:29,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-08-30 04:59:29,337 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-08-30 04:59:29,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-08-30 04:59:29,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:29,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-08-30 04:59:29,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:29,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:29,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:29,341 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 218 flow. Second operand 3 states and 957 transitions. [2023-08-30 04:59:29,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 53 transitions, 320 flow [2023-08-30 04:59:29,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 04:59:29,342 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 208 flow [2023-08-30 04:59:29,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2023-08-30 04:59:29,343 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-30 04:59:29,343 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 208 flow [2023-08-30 04:59:29,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 307.2) internal successors, (1536), 5 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:29,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:29,343 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:29,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:29,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:29,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:29,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1047128379, now seen corresponding path program 1 times [2023-08-30 04:59:29,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:29,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981702429] [2023-08-30 04:59:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:29,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:29,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:29,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 04:59:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 04:59:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:29,964 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2023-08-30 04:59:29,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2023-08-30 04:59:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:30,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:59:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:30,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2023-08-30 04:59:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:30,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 04:59:30,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:30,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981702429] [2023-08-30 04:59:30,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981702429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 04:59:30,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 04:59:30,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 04:59:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506943747] [2023-08-30 04:59:30,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 04:59:30,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 04:59:30,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:30,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 04:59:30,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 04:59:30,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 744 [2023-08-30 04:59:30,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 305.2) internal successors, (1526), 5 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:30,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:30,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 744 [2023-08-30 04:59:30,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 04:59:31,283 INFO L130 PetriNetUnfolder]: 2521/3636 cut-off events. [2023-08-30 04:59:31,283 INFO L131 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2023-08-30 04:59:31,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8006 conditions, 3636 events. 2521/3636 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16330 event pairs, 2113 based on Foata normal form. 0/2204 useless extension candidates. Maximal degree in co-relation 7991. Up to 3636 conditions per place. [2023-08-30 04:59:31,295 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-30 04:59:31,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 306 flow [2023-08-30 04:59:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 04:59:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 04:59:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 949 transitions. [2023-08-30 04:59:31,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425179211469534 [2023-08-30 04:59:31,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 949 transitions. [2023-08-30 04:59:31,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 949 transitions. [2023-08-30 04:59:31,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 04:59:31,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 949 transitions. [2023-08-30 04:59:31,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 316.3333333333333) internal successors, (949), 3 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:31,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:31,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:31,300 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 208 flow. Second operand 3 states and 949 transitions. [2023-08-30 04:59:31,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 306 flow [2023-08-30 04:59:31,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 04:59:31,302 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 205 flow [2023-08-30 04:59:31,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-08-30 04:59:31,305 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-30 04:59:31,305 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 205 flow [2023-08-30 04:59:31,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.2) internal successors, (1526), 5 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:31,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 04:59:31,306 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 04:59:31,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 04:59:31,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:31,517 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 04:59:31,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 04:59:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1896615727, now seen corresponding path program 1 times [2023-08-30 04:59:31,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 04:59:31,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774125896] [2023-08-30 04:59:31,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 04:59:31,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 04:59:31,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 04:59:31,519 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 04:59:31,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 04:59:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 04:59:31,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 04:59:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 04:59:31,963 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 04:59:31,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 04:59:32,033 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 04:59:32,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 04:59:32,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 04:59:32,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:59:32,110 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 04:59:32,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 04:59:32,142 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 04:59:32,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 04:59:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:32,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 04:59:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 04:59:34,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 04:59:34,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774125896] [2023-08-30 04:59:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774125896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 04:59:34,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 04:59:34,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-08-30 04:59:34,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674516915] [2023-08-30 04:59:34,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 04:59:34,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 04:59:34,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 04:59:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 04:59:34,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 04:59:38,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:59:41,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:59:44,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:59:46,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:59:49,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:59:51,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:59:54,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:59:59,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 04:59:59,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 744 [2023-08-30 04:59:59,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 205 flow. Second operand has 11 states, 11 states have (on average 288.1818181818182) internal successors, (3170), 11 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 04:59:59,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 04:59:59,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 744 [2023-08-30 04:59:59,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:01,217 INFO L130 PetriNetUnfolder]: 5561/7970 cut-off events. [2023-08-30 05:00:01,217 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-08-30 05:00:01,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17255 conditions, 7970 events. 5561/7970 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 40873 event pairs, 901 based on Foata normal form. 300/5082 useless extension candidates. Maximal degree in co-relation 17240. Up to 1838 conditions per place. [2023-08-30 05:00:01,278 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 151 selfloop transitions, 9 changer transitions 0/160 dead transitions. [2023-08-30 05:00:01,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 160 transitions, 773 flow [2023-08-30 05:00:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:00:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:00:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2439 transitions. [2023-08-30 05:00:01,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097782258064516 [2023-08-30 05:00:01,284 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2439 transitions. [2023-08-30 05:00:01,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2439 transitions. [2023-08-30 05:00:01,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:01,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2439 transitions. [2023-08-30 05:00:01,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 304.875) internal successors, (2439), 8 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:01,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:01,293 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:01,293 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 205 flow. Second operand 8 states and 2439 transitions. [2023-08-30 05:00:01,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 160 transitions, 773 flow [2023-08-30 05:00:01,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 160 transitions, 772 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 05:00:01,297 INFO L231 Difference]: Finished difference. Result has 75 places, 55 transitions, 259 flow [2023-08-30 05:00:01,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=259, PETRI_PLACES=75, PETRI_TRANSITIONS=55} [2023-08-30 05:00:01,298 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-30 05:00:01,298 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 55 transitions, 259 flow [2023-08-30 05:00:01,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 288.1818181818182) internal successors, (3170), 11 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:01,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:01,299 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:01,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:01,517 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:01,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1896615663, now seen corresponding path program 1 times [2023-08-30 05:00:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523052841] [2023-08-30 05:00:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:01,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:01,519 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:01,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 05:00:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:01,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 05:00:01,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:02,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:00:02,042 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:00:02,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:00:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:02,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:02,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:02,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523052841] [2023-08-30 05:00:02,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523052841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:00:02,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:00:02,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 05:00:02,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252806281] [2023-08-30 05:00:02,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:00:02,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:00:02,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:02,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:00:02,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:00:05,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-30 05:00:05,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 55 transitions, 259 flow. Second operand has 10 states, 10 states have (on average 301.2) internal successors, (3012), 10 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:05,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:05,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-30 05:00:05,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:06,975 INFO L130 PetriNetUnfolder]: 5221/7530 cut-off events. [2023-08-30 05:00:06,976 INFO L131 PetriNetUnfolder]: For 3688/3688 co-relation queries the response was YES. [2023-08-30 05:00:06,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18373 conditions, 7530 events. 5221/7530 cut-off events. For 3688/3688 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 38372 event pairs, 1325 based on Foata normal form. 300/5254 useless extension candidates. Maximal degree in co-relation 18354. Up to 2326 conditions per place. [2023-08-30 05:00:07,014 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 151 selfloop transitions, 7 changer transitions 0/158 dead transitions. [2023-08-30 05:00:07,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 158 transitions, 809 flow [2023-08-30 05:00:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:00:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:00:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2541 transitions. [2023-08-30 05:00:07,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4269153225806452 [2023-08-30 05:00:07,018 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2541 transitions. [2023-08-30 05:00:07,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2541 transitions. [2023-08-30 05:00:07,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:07,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2541 transitions. [2023-08-30 05:00:07,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 317.625) internal successors, (2541), 8 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:07,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:07,024 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:07,024 INFO L175 Difference]: Start difference. First operand has 75 places, 55 transitions, 259 flow. Second operand 8 states and 2541 transitions. [2023-08-30 05:00:07,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 158 transitions, 809 flow [2023-08-30 05:00:07,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 158 transitions, 792 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-30 05:00:07,045 INFO L231 Difference]: Finished difference. Result has 79 places, 55 transitions, 262 flow [2023-08-30 05:00:07,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=262, PETRI_PLACES=79, PETRI_TRANSITIONS=55} [2023-08-30 05:00:07,045 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 14 predicate places. [2023-08-30 05:00:07,046 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 55 transitions, 262 flow [2023-08-30 05:00:07,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.2) internal successors, (3012), 10 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:07,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:07,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:07,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-08-30 05:00:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:07,261 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:07,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756566, now seen corresponding path program 1 times [2023-08-30 05:00:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80542712] [2023-08-30 05:00:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:07,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:07,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:07,263 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:07,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-08-30 05:00:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 05:00:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:07,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:00:07,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:00:07,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:00:07,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:00:07,687 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:00:07,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:00:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:07,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:00:07,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80542712] [2023-08-30 05:00:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80542712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:00:07,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:00:07,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:00:07,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925844341] [2023-08-30 05:00:07,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:00:07,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:00:07,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:00:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:00:08,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-08-30 05:00:08,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 55 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 296.4) internal successors, (1482), 5 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:08,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:08,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-08-30 05:00:08,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:09,549 INFO L130 PetriNetUnfolder]: 8941/12880 cut-off events. [2023-08-30 05:00:09,549 INFO L131 PetriNetUnfolder]: For 7706/7706 co-relation queries the response was YES. [2023-08-30 05:00:09,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31334 conditions, 12880 events. 8941/12880 cut-off events. For 7706/7706 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 72118 event pairs, 4477 based on Foata normal form. 0/8238 useless extension candidates. Maximal degree in co-relation 31315. Up to 7518 conditions per place. [2023-08-30 05:00:09,667 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-30 05:00:09,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 556 flow [2023-08-30 05:00:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:00:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:00:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1535 transitions. [2023-08-30 05:00:09,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263440860215056 [2023-08-30 05:00:09,671 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1535 transitions. [2023-08-30 05:00:09,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1535 transitions. [2023-08-30 05:00:09,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:09,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1535 transitions. [2023-08-30 05:00:09,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 307.0) internal successors, (1535), 5 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:09,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:09,677 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:09,678 INFO L175 Difference]: Start difference. First operand has 79 places, 55 transitions, 262 flow. Second operand 5 states and 1535 transitions. [2023-08-30 05:00:09,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 556 flow [2023-08-30 05:00:09,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 536 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:00:09,687 INFO L231 Difference]: Finished difference. Result has 78 places, 56 transitions, 266 flow [2023-08-30 05:00:09,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=78, PETRI_TRANSITIONS=56} [2023-08-30 05:00:09,688 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2023-08-30 05:00:09,688 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 56 transitions, 266 flow [2023-08-30 05:00:09,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.4) internal successors, (1482), 5 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:09,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:09,689 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:09,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:09,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:09,903 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:09,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756500, now seen corresponding path program 1 times [2023-08-30 05:00:09,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:09,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463465021] [2023-08-30 05:00:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:09,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:09,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:09,904 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:09,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-08-30 05:00:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:00:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:10,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:00:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:10,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:00:10,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:10,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463465021] [2023-08-30 05:00:10,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463465021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:00:10,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:00:10,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:00:10,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975123677] [2023-08-30 05:00:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:00:10,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:00:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:00:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:00:10,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 744 [2023-08-30 05:00:10,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 56 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:10,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:10,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 744 [2023-08-30 05:00:10,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:11,415 INFO L130 PetriNetUnfolder]: 6357/9192 cut-off events. [2023-08-30 05:00:11,415 INFO L131 PetriNetUnfolder]: For 4090/4090 co-relation queries the response was YES. [2023-08-30 05:00:11,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23277 conditions, 9192 events. 6357/9192 cut-off events. For 4090/4090 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 47249 event pairs, 5489 based on Foata normal form. 0/6566 useless extension candidates. Maximal degree in co-relation 23257. Up to 9174 conditions per place. [2023-08-30 05:00:11,467 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 52 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-30 05:00:11,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 54 transitions, 370 flow [2023-08-30 05:00:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:00:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:00:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1222 transitions. [2023-08-30 05:00:11,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106182795698925 [2023-08-30 05:00:11,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1222 transitions. [2023-08-30 05:00:11,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1222 transitions. [2023-08-30 05:00:11,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:11,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1222 transitions. [2023-08-30 05:00:11,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 305.5) internal successors, (1222), 4 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:11,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:11,474 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:11,474 INFO L175 Difference]: Start difference. First operand has 78 places, 56 transitions, 266 flow. Second operand 4 states and 1222 transitions. [2023-08-30 05:00:11,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 54 transitions, 370 flow [2023-08-30 05:00:11,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 54 transitions, 364 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:00:11,483 INFO L231 Difference]: Finished difference. Result has 76 places, 54 transitions, 260 flow [2023-08-30 05:00:11,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=76, PETRI_TRANSITIONS=54} [2023-08-30 05:00:11,483 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-08-30 05:00:11,483 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 54 transitions, 260 flow [2023-08-30 05:00:11,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:11,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:11,484 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:11,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:11,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:11,685 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:11,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1898756499, now seen corresponding path program 1 times [2023-08-30 05:00:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:11,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364167519] [2023-08-30 05:00:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:11,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:11,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:11,687 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:11,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-08-30 05:00:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:00:11,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:12,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:00:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:12,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:00:12,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:12,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364167519] [2023-08-30 05:00:12,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364167519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:00:12,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:00:12,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:00:12,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903914367] [2023-08-30 05:00:12,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:00:12,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:00:12,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:12,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:00:12,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:00:12,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 744 [2023-08-30 05:00:12,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 54 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 302.4) internal successors, (1512), 5 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:12,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:12,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 744 [2023-08-30 05:00:12,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:13,335 INFO L130 PetriNetUnfolder]: 5735/8304 cut-off events. [2023-08-30 05:00:13,335 INFO L131 PetriNetUnfolder]: For 3964/3964 co-relation queries the response was YES. [2023-08-30 05:00:13,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20893 conditions, 8304 events. 5735/8304 cut-off events. For 3964/3964 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 43158 event pairs, 3193 based on Foata normal form. 0/6094 useless extension candidates. Maximal degree in co-relation 20873. Up to 5512 conditions per place. [2023-08-30 05:00:13,380 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 77 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-30 05:00:13,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 528 flow [2023-08-30 05:00:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:00:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:00:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1560 transitions. [2023-08-30 05:00:13,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2023-08-30 05:00:13,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1560 transitions. [2023-08-30 05:00:13,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1560 transitions. [2023-08-30 05:00:13,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:13,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1560 transitions. [2023-08-30 05:00:13,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:13,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:13,386 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:13,386 INFO L175 Difference]: Start difference. First operand has 76 places, 54 transitions, 260 flow. Second operand 5 states and 1560 transitions. [2023-08-30 05:00:13,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 528 flow [2023-08-30 05:00:13,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 81 transitions, 525 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:00:13,391 INFO L231 Difference]: Finished difference. Result has 79 places, 54 transitions, 269 flow [2023-08-30 05:00:13,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=79, PETRI_TRANSITIONS=54} [2023-08-30 05:00:13,392 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 14 predicate places. [2023-08-30 05:00:13,392 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 54 transitions, 269 flow [2023-08-30 05:00:13,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 302.4) internal successors, (1512), 5 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:13,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:13,393 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:13,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:13,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:13,607 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:13,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:13,607 INFO L85 PathProgramCache]: Analyzing trace with hash 655003940, now seen corresponding path program 1 times [2023-08-30 05:00:13,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:13,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036274521] [2023-08-30 05:00:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:13,609 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:13,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-08-30 05:00:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:00:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:14,173 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:00:14,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 05:00:14,252 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:00:14,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:00:14,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:00:14,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:00:14,329 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:00:14,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:00:14,374 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:00:14,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:00:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:14,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:00:14,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:14,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036274521] [2023-08-30 05:00:14,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036274521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:00:14,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:00:14,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:00:14,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396414607] [2023-08-30 05:00:14,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:00:14,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:00:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:14,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:00:14,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:00:14,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 294 out of 744 [2023-08-30 05:00:14,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 54 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 296.8) internal successors, (1484), 5 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:14,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:14,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 294 of 744 [2023-08-30 05:00:14,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:16,236 INFO L130 PetriNetUnfolder]: 8765/12656 cut-off events. [2023-08-30 05:00:16,236 INFO L131 PetriNetUnfolder]: For 9555/9555 co-relation queries the response was YES. [2023-08-30 05:00:16,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33225 conditions, 12656 events. 8765/12656 cut-off events. For 9555/9555 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 69477 event pairs, 4925 based on Foata normal form. 0/9514 useless extension candidates. Maximal degree in co-relation 33204. Up to 8298 conditions per place. [2023-08-30 05:00:16,330 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 78 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-30 05:00:16,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 556 flow [2023-08-30 05:00:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:00:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:00:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1529 transitions. [2023-08-30 05:00:16,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110215053763441 [2023-08-30 05:00:16,332 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1529 transitions. [2023-08-30 05:00:16,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1529 transitions. [2023-08-30 05:00:16,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:16,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1529 transitions. [2023-08-30 05:00:16,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 305.8) internal successors, (1529), 5 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:16,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:16,336 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:16,336 INFO L175 Difference]: Start difference. First operand has 79 places, 54 transitions, 269 flow. Second operand 5 states and 1529 transitions. [2023-08-30 05:00:16,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 556 flow [2023-08-30 05:00:16,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 544 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:00:16,346 INFO L231 Difference]: Finished difference. Result has 80 places, 55 transitions, 277 flow [2023-08-30 05:00:16,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2023-08-30 05:00:16,347 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2023-08-30 05:00:16,347 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 277 flow [2023-08-30 05:00:16,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.8) internal successors, (1484), 5 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:16,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:16,347 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:16,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:16,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:16,548 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:16,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:16,549 INFO L85 PathProgramCache]: Analyzing trace with hash 655004069, now seen corresponding path program 1 times [2023-08-30 05:00:16,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:16,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535823419] [2023-08-30 05:00:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:16,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:16,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:16,550 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:16,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-08-30 05:00:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 05:00:16,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:16,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:00:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:17,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:00:17,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:17,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535823419] [2023-08-30 05:00:17,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535823419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:00:17,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:00:17,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:00:17,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115239257] [2023-08-30 05:00:17,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:00:17,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:00:17,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:17,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:00:17,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:00:17,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 744 [2023-08-30 05:00:17,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 302.8) internal successors, (1514), 5 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:17,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:17,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 744 [2023-08-30 05:00:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:18,762 INFO L130 PetriNetUnfolder]: 7755/11212 cut-off events. [2023-08-30 05:00:18,763 INFO L131 PetriNetUnfolder]: For 8039/8039 co-relation queries the response was YES. [2023-08-30 05:00:18,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30938 conditions, 11212 events. 7755/11212 cut-off events. For 8039/8039 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 59993 event pairs, 4925 based on Foata normal form. 0/9482 useless extension candidates. Maximal degree in co-relation 30916. Up to 8286 conditions per place. [2023-08-30 05:00:18,831 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 77 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-30 05:00:18,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 554 flow [2023-08-30 05:00:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:00:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:00:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1558 transitions. [2023-08-30 05:00:18,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188172043010753 [2023-08-30 05:00:18,833 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1558 transitions. [2023-08-30 05:00:18,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1558 transitions. [2023-08-30 05:00:18,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:18,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1558 transitions. [2023-08-30 05:00:18,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:18,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:18,837 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:18,837 INFO L175 Difference]: Start difference. First operand has 80 places, 55 transitions, 277 flow. Second operand 5 states and 1558 transitions. [2023-08-30 05:00:18,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 554 flow [2023-08-30 05:00:18,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 81 transitions, 548 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:00:18,853 INFO L231 Difference]: Finished difference. Result has 82 places, 55 transitions, 283 flow [2023-08-30 05:00:18,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=82, PETRI_TRANSITIONS=55} [2023-08-30 05:00:18,854 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2023-08-30 05:00:18,854 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 55 transitions, 283 flow [2023-08-30 05:00:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 302.8) internal successors, (1514), 5 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:18,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:18,855 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:18,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:19,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:19,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:19,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash 656146441, now seen corresponding path program 1 times [2023-08-30 05:00:19,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060151809] [2023-08-30 05:00:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:19,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:19,070 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:19,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-08-30 05:00:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:00:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:19,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:00:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:19,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:19,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:19,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060151809] [2023-08-30 05:00:19,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060151809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:00:19,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:00:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 05:00:19,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131298839] [2023-08-30 05:00:19,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:00:19,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:00:19,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:19,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:00:19,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:00:22,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-30 05:00:22,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 55 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 301.4) internal successors, (3014), 10 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:22,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:22,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-30 05:00:22,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:25,635 INFO L130 PetriNetUnfolder]: 18069/26092 cut-off events. [2023-08-30 05:00:25,635 INFO L131 PetriNetUnfolder]: For 27490/27490 co-relation queries the response was YES. [2023-08-30 05:00:25,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74205 conditions, 26092 events. 18069/26092 cut-off events. For 27490/27490 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 155354 event pairs, 4417 based on Foata normal form. 1074/24022 useless extension candidates. Maximal degree in co-relation 74182. Up to 7434 conditions per place. [2023-08-30 05:00:25,877 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 166 selfloop transitions, 7 changer transitions 0/173 dead transitions. [2023-08-30 05:00:25,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 173 transitions, 1149 flow [2023-08-30 05:00:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:00:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:00:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2526 transitions. [2023-08-30 05:00:25,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42439516129032256 [2023-08-30 05:00:25,880 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2526 transitions. [2023-08-30 05:00:25,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2526 transitions. [2023-08-30 05:00:25,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:25,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2526 transitions. [2023-08-30 05:00:25,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 315.75) internal successors, (2526), 8 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:25,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:25,886 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:25,887 INFO L175 Difference]: Start difference. First operand has 82 places, 55 transitions, 283 flow. Second operand 8 states and 2526 transitions. [2023-08-30 05:00:25,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 173 transitions, 1149 flow [2023-08-30 05:00:25,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 173 transitions, 1125 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 05:00:25,910 INFO L231 Difference]: Finished difference. Result has 88 places, 58 transitions, 315 flow [2023-08-30 05:00:25,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=88, PETRI_TRANSITIONS=58} [2023-08-30 05:00:25,910 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2023-08-30 05:00:25,911 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 58 transitions, 315 flow [2023-08-30 05:00:25,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.4) internal successors, (3014), 10 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:25,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:25,911 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:25,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:26,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:26,126 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:26,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash 656146374, now seen corresponding path program 1 times [2023-08-30 05:00:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:26,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074456612] [2023-08-30 05:00:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:26,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:26,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:26,128 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:26,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-08-30 05:00:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:26,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 05:00:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:26,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:00:26,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:00:26,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:00:26,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:00:26,738 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:00:26,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:00:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:26,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:27,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:27,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074456612] [2023-08-30 05:00:27,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074456612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:00:27,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:00:27,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 05:00:27,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153487689] [2023-08-30 05:00:27,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:00:27,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:00:27,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:00:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:00:30,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-08-30 05:00:30,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 58 transitions, 315 flow. Second operand has 10 states, 10 states have (on average 295.6) internal successors, (2956), 10 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:30,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:30,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-08-30 05:00:30,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:33,752 INFO L130 PetriNetUnfolder]: 15543/22492 cut-off events. [2023-08-30 05:00:33,752 INFO L131 PetriNetUnfolder]: For 27619/27619 co-relation queries the response was YES. [2023-08-30 05:00:33,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66020 conditions, 22492 events. 15543/22492 cut-off events. For 27619/27619 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 131050 event pairs, 2857 based on Foata normal form. 1074/20608 useless extension candidates. Maximal degree in co-relation 65994. Up to 6160 conditions per place. [2023-08-30 05:00:33,995 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 160 selfloop transitions, 10 changer transitions 0/170 dead transitions. [2023-08-30 05:00:33,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 170 transitions, 1135 flow [2023-08-30 05:00:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:00:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:00:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2474 transitions. [2023-08-30 05:00:33,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156586021505376 [2023-08-30 05:00:33,999 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2474 transitions. [2023-08-30 05:00:33,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2474 transitions. [2023-08-30 05:00:33,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:33,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2474 transitions. [2023-08-30 05:00:34,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 309.25) internal successors, (2474), 8 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:34,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:34,005 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:34,005 INFO L175 Difference]: Start difference. First operand has 88 places, 58 transitions, 315 flow. Second operand 8 states and 2474 transitions. [2023-08-30 05:00:34,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 170 transitions, 1135 flow [2023-08-30 05:00:34,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 170 transitions, 1124 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 05:00:34,089 INFO L231 Difference]: Finished difference. Result has 96 places, 59 transitions, 349 flow [2023-08-30 05:00:34,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=349, PETRI_PLACES=96, PETRI_TRANSITIONS=59} [2023-08-30 05:00:34,090 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2023-08-30 05:00:34,090 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 59 transitions, 349 flow [2023-08-30 05:00:34,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 295.6) internal successors, (2956), 10 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:34,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:34,091 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:34,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:34,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:34,305 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:34,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:34,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1169704373, now seen corresponding path program 1 times [2023-08-30 05:00:34,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:34,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052234000] [2023-08-30 05:00:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:34,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:34,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:34,307 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:34,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-08-30 05:00:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:34,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 05:00:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:34,854 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:00:34,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:00:34,922 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:00:34,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 05:00:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:00:34,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:00:35,004 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:00:35,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:00:35,035 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:00:35,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:00:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:35,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:37,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:37,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052234000] [2023-08-30 05:00:37,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052234000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:00:37,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:00:37,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-08-30 05:00:37,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532286098] [2023-08-30 05:00:37,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:00:37,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 05:00:37,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 05:00:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-30 05:00:40,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:00:43,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-08-30 05:00:43,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 59 transitions, 349 flow. Second operand has 11 states, 11 states have (on average 294.72727272727275) internal successors, (3242), 11 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:43,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:43,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-08-30 05:00:43,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:00:49,590 INFO L130 PetriNetUnfolder]: 32661/46784 cut-off events. [2023-08-30 05:00:49,590 INFO L131 PetriNetUnfolder]: For 88051/88051 co-relation queries the response was YES. [2023-08-30 05:00:50,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148449 conditions, 46784 events. 32661/46784 cut-off events. For 88051/88051 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 297706 event pairs, 8173 based on Foata normal form. 0/45328 useless extension candidates. Maximal degree in co-relation 148419. Up to 13712 conditions per place. [2023-08-30 05:00:50,306 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 177 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2023-08-30 05:00:50,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 185 transitions, 1475 flow [2023-08-30 05:00:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:00:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:00:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2462 transitions. [2023-08-30 05:00:50,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41364247311827956 [2023-08-30 05:00:50,309 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2462 transitions. [2023-08-30 05:00:50,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2462 transitions. [2023-08-30 05:00:50,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:00:50,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2462 transitions. [2023-08-30 05:00:50,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 307.75) internal successors, (2462), 8 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:50,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:50,317 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:50,318 INFO L175 Difference]: Start difference. First operand has 96 places, 59 transitions, 349 flow. Second operand 8 states and 2462 transitions. [2023-08-30 05:00:50,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 185 transitions, 1475 flow [2023-08-30 05:00:50,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 185 transitions, 1352 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-30 05:00:50,412 INFO L231 Difference]: Finished difference. Result has 98 places, 63 transitions, 375 flow [2023-08-30 05:00:50,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=375, PETRI_PLACES=98, PETRI_TRANSITIONS=63} [2023-08-30 05:00:50,413 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-30 05:00:50,413 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 63 transitions, 375 flow [2023-08-30 05:00:50,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 294.72727272727275) internal successors, (3242), 11 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:50,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:00:50,414 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:00:50,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-08-30 05:00:50,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:50,614 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:00:50,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:00:50,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1169704244, now seen corresponding path program 1 times [2023-08-30 05:00:50,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:00:50,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549427251] [2023-08-30 05:00:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:00:50,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:00:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:00:50,617 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:00:50,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-08-30 05:00:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:00:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 05:00:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:00:51,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:00:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:51,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:00:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:00:51,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:00:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549427251] [2023-08-30 05:00:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549427251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:00:51,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:00:51,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-08-30 05:00:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152618596] [2023-08-30 05:00:51,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:00:51,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 05:00:51,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:00:51,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 05:00:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-30 05:00:53,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 744 [2023-08-30 05:00:53,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 63 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 301.6) internal successors, (3016), 10 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:00:53,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:00:53,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 744 [2023-08-30 05:00:53,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:01:00,365 INFO L130 PetriNetUnfolder]: 27723/40090 cut-off events. [2023-08-30 05:01:00,365 INFO L131 PetriNetUnfolder]: For 66685/66685 co-relation queries the response was YES. [2023-08-30 05:01:00,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132458 conditions, 40090 events. 27723/40090 cut-off events. For 66685/66685 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 253547 event pairs, 10121 based on Foata normal form. 2634/41584 useless extension candidates. Maximal degree in co-relation 132428. Up to 16608 conditions per place. [2023-08-30 05:01:00,884 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 175 selfloop transitions, 7 changer transitions 0/182 dead transitions. [2023-08-30 05:01:00,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 182 transitions, 1369 flow [2023-08-30 05:01:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:01:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:01:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2515 transitions. [2023-08-30 05:01:00,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225470430107527 [2023-08-30 05:01:00,887 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2515 transitions. [2023-08-30 05:01:00,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2515 transitions. [2023-08-30 05:01:00,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:01:00,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2515 transitions. [2023-08-30 05:01:00,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 314.375) internal successors, (2515), 8 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:00,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:00,894 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:00,894 INFO L175 Difference]: Start difference. First operand has 98 places, 63 transitions, 375 flow. Second operand 8 states and 2515 transitions. [2023-08-30 05:01:00,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 182 transitions, 1369 flow [2023-08-30 05:01:01,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 182 transitions, 1350 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-30 05:01:01,406 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 364 flow [2023-08-30 05:01:01,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2023-08-30 05:01:01,407 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 35 predicate places. [2023-08-30 05:01:01,407 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 364 flow [2023-08-30 05:01:01,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 301.6) internal successors, (3016), 10 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:01,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:01:01,407 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:01:01,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2023-08-30 05:01:01,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:01:01,608 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:01:01,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:01:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1583406364, now seen corresponding path program 2 times [2023-08-30 05:01:01,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:01:01,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352359570] [2023-08-30 05:01:01,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:01:01,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:01:01,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:01:01,611 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:01:01,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-08-30 05:01:02,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:01:02,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:01:02,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:01:02,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:01:02,182 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:01:02,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:01:02,253 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:01:02,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 05:01:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:01:02,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:01:02,315 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:01:02,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:01:02,347 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:01:02,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:01:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:01:02,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:01:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:01:05,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:01:05,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352359570] [2023-08-30 05:01:05,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352359570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:01:05,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:01:05,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-08-30 05:01:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381595104] [2023-08-30 05:01:05,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:01:05,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 05:01:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:01:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 05:01:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-08-30 05:01:09,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:12,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:15,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:18,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:23,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:26,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:28,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:30,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:33,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:01:37,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 744 [2023-08-30 05:01:37,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 364 flow. Second operand has 17 states, 17 states have (on average 287.11764705882354) internal successors, (4881), 17 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:37,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:01:37,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 744 [2023-08-30 05:01:37,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:01:45,421 INFO L130 PetriNetUnfolder]: 33813/48864 cut-off events. [2023-08-30 05:01:45,421 INFO L131 PetriNetUnfolder]: For 77586/77586 co-relation queries the response was YES. [2023-08-30 05:01:45,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156647 conditions, 48864 events. 33813/48864 cut-off events. For 77586/77586 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 316176 event pairs, 8173 based on Foata normal form. 878/48356 useless extension candidates. Maximal degree in co-relation 156619. Up to 13712 conditions per place. [2023-08-30 05:01:45,890 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 232 selfloop transitions, 9 changer transitions 0/241 dead transitions. [2023-08-30 05:01:45,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 241 transitions, 1804 flow [2023-08-30 05:01:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:01:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:01:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3010 transitions. [2023-08-30 05:01:45,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40456989247311825 [2023-08-30 05:01:45,893 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3010 transitions. [2023-08-30 05:01:45,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3010 transitions. [2023-08-30 05:01:45,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:01:45,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3010 transitions. [2023-08-30 05:01:45,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:45,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:45,899 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:45,899 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 364 flow. Second operand 10 states and 3010 transitions. [2023-08-30 05:01:45,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 241 transitions, 1804 flow [2023-08-30 05:01:46,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 241 transitions, 1788 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 05:01:46,374 INFO L231 Difference]: Finished difference. Result has 104 places, 64 transitions, 389 flow [2023-08-30 05:01:46,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=389, PETRI_PLACES=104, PETRI_TRANSITIONS=64} [2023-08-30 05:01:46,375 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 39 predicate places. [2023-08-30 05:01:46,375 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 64 transitions, 389 flow [2023-08-30 05:01:46,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 287.11764705882354) internal successors, (4881), 17 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:46,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:01:46,376 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:01:46,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-08-30 05:01:46,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:01:46,581 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:01:46,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:01:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1583406235, now seen corresponding path program 2 times [2023-08-30 05:01:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:01:46,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403018547] [2023-08-30 05:01:46,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:01:46,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:01:46,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:01:46,586 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:01:46,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-08-30 05:01:46,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:01:46,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:01:46,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-30 05:01:46,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:01:46,899 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:01:46,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 05:01:46,976 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:01:46,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:01:47,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:01:47,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:01:47,041 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:01:47,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:01:47,077 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:01:47,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:01:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-30 05:01:47,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:01:47,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:01:47,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403018547] [2023-08-30 05:01:47,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403018547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:01:47,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:01:47,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:01:47,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672524366] [2023-08-30 05:01:47,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:01:47,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:01:47,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:01:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:01:47,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:01:47,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-08-30 05:01:47,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 64 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 294.5) internal successors, (1767), 6 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:47,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:01:47,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-08-30 05:01:47,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:01:54,020 INFO L130 PetriNetUnfolder]: 29753/43048 cut-off events. [2023-08-30 05:01:54,020 INFO L131 PetriNetUnfolder]: For 77092/77092 co-relation queries the response was YES. [2023-08-30 05:01:54,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143223 conditions, 43048 events. 29753/43048 cut-off events. For 77092/77092 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 269775 event pairs, 27653 based on Foata normal form. 1756/43582 useless extension candidates. Maximal degree in co-relation 143193. Up to 43030 conditions per place. [2023-08-30 05:01:54,533 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 59 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-08-30 05:01:54,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 62 transitions, 500 flow [2023-08-30 05:01:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:01:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:01:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1496 transitions. [2023-08-30 05:01:54,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021505376344086 [2023-08-30 05:01:54,535 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1496 transitions. [2023-08-30 05:01:54,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1496 transitions. [2023-08-30 05:01:54,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:01:54,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1496 transitions. [2023-08-30 05:01:54,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 299.2) internal successors, (1496), 5 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:54,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:54,540 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:54,540 INFO L175 Difference]: Start difference. First operand has 104 places, 64 transitions, 389 flow. Second operand 5 states and 1496 transitions. [2023-08-30 05:01:54,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 62 transitions, 500 flow [2023-08-30 05:01:54,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 62 transitions, 479 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-30 05:01:54,720 INFO L231 Difference]: Finished difference. Result has 98 places, 62 transitions, 361 flow [2023-08-30 05:01:54,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=98, PETRI_TRANSITIONS=62} [2023-08-30 05:01:54,721 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-30 05:01:54,721 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 62 transitions, 361 flow [2023-08-30 05:01:54,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 294.5) internal successors, (1767), 6 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:54,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:01:54,721 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:01:54,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-08-30 05:01:54,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:01:54,925 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:01:54,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:01:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1059227334, now seen corresponding path program 2 times [2023-08-30 05:01:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:01:54,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800227199] [2023-08-30 05:01:54,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:01:54,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:01:54,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:01:54,927 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:01:54,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-08-30 05:01:55,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:01:55,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:01:55,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-30 05:01:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:01:55,249 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:01:55,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:01:55,326 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:01:55,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 05:01:55,402 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-08-30 05:01:55,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-08-30 05:01:55,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:01:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:01:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:01:55,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-08-30 05:01:55,687 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-08-30 05:01:55,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 05:01:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-30 05:01:56,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:01:56,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:01:56,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800227199] [2023-08-30 05:01:56,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800227199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:01:56,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:01:56,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:01:56,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821631361] [2023-08-30 05:01:56,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:01:56,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:01:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:01:56,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:01:56,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:01:56,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 293 out of 744 [2023-08-30 05:01:56,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 62 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 295.4) internal successors, (1477), 5 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:01:56,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:01:56,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 293 of 744 [2023-08-30 05:01:56,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:02:02,729 INFO L130 PetriNetUnfolder]: 28419/41172 cut-off events. [2023-08-30 05:02:02,729 INFO L131 PetriNetUnfolder]: For 55195/55195 co-relation queries the response was YES. [2023-08-30 05:02:03,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129850 conditions, 41172 events. 28419/41172 cut-off events. For 55195/55195 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 257396 event pairs, 26385 based on Foata normal form. 0/40522 useless extension candidates. Maximal degree in co-relation 129821. Up to 41160 conditions per place. [2023-08-30 05:02:03,176 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 58 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-08-30 05:02:03,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 61 transitions, 477 flow [2023-08-30 05:02:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:02:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:02:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1500 transitions. [2023-08-30 05:02:03,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2023-08-30 05:02:03,179 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1500 transitions. [2023-08-30 05:02:03,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1500 transitions. [2023-08-30 05:02:03,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:02:03,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1500 transitions. [2023-08-30 05:02:03,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 300.0) internal successors, (1500), 5 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:03,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:03,182 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:03,182 INFO L175 Difference]: Start difference. First operand has 98 places, 62 transitions, 361 flow. Second operand 5 states and 1500 transitions. [2023-08-30 05:02:03,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 61 transitions, 477 flow [2023-08-30 05:02:03,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 61 transitions, 472 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:02:03,324 INFO L231 Difference]: Finished difference. Result has 98 places, 61 transitions, 356 flow [2023-08-30 05:02:03,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=356, PETRI_PLACES=98, PETRI_TRANSITIONS=61} [2023-08-30 05:02:03,325 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-30 05:02:03,325 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 61 transitions, 356 flow [2023-08-30 05:02:03,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 295.4) internal successors, (1477), 5 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:03,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:02:03,326 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:02:03,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-08-30 05:02:03,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:03,526 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:02:03,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:02:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1059227270, now seen corresponding path program 2 times [2023-08-30 05:02:03,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:02:03,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521200583] [2023-08-30 05:02:03,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:02:03,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:02:03,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:02:03,528 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:02:03,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-08-30 05:02:03,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:02:03,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:02:03,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 05:02:03,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:02:03,997 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-30 05:02:03,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2023-08-30 05:02:04,070 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2023-08-30 05:02:04,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2023-08-30 05:02:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:02:04,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:02:04,136 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:02:04,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:02:04,169 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:02:04,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:02:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:02:04,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:02:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:02:09,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:02:09,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521200583] [2023-08-30 05:02:09,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521200583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:02:09,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:02:09,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2023-08-30 05:02:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793961025] [2023-08-30 05:02:09,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:02:09,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 05:02:09,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:02:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 05:02:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=206, Unknown=1, NotChecked=0, Total=272 [2023-08-30 05:02:11,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:15,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:18,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:20,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:22,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:24,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:28,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:30,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:34,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:37,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:42,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:46,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:48,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:51,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:02:52,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 744 [2023-08-30 05:02:52,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 61 transitions, 356 flow. Second operand has 17 states, 17 states have (on average 282.11764705882354) internal successors, (4796), 17 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:02:52,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:02:52,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 744 [2023-08-30 05:02:52,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:00,075 INFO L130 PetriNetUnfolder]: 33569/48652 cut-off events. [2023-08-30 05:03:00,075 INFO L131 PetriNetUnfolder]: For 81670/81670 co-relation queries the response was YES. [2023-08-30 05:03:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153690 conditions, 48652 events. 33569/48652 cut-off events. For 81670/81670 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 314691 event pairs, 5605 based on Foata normal form. 542/48426 useless extension candidates. Maximal degree in co-relation 153661. Up to 9370 conditions per place. [2023-08-30 05:03:00,715 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 241 selfloop transitions, 10 changer transitions 0/251 dead transitions. [2023-08-30 05:03:00,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 251 transitions, 1797 flow [2023-08-30 05:03:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:03:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:03:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2970 transitions. [2023-08-30 05:03:00,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2023-08-30 05:03:00,718 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2970 transitions. [2023-08-30 05:03:00,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2970 transitions. [2023-08-30 05:03:00,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:00,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2970 transitions. [2023-08-30 05:03:00,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 297.0) internal successors, (2970), 10 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:00,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:00,726 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:00,727 INFO L175 Difference]: Start difference. First operand has 98 places, 61 transitions, 356 flow. Second operand 10 states and 2970 transitions. [2023-08-30 05:03:00,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 251 transitions, 1797 flow [2023-08-30 05:03:01,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 251 transitions, 1792 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:03:01,176 INFO L231 Difference]: Finished difference. Result has 106 places, 63 transitions, 396 flow [2023-08-30 05:03:01,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=396, PETRI_PLACES=106, PETRI_TRANSITIONS=63} [2023-08-30 05:03:01,176 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-08-30 05:03:01,176 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 63 transitions, 396 flow [2023-08-30 05:03:01,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 282.11764705882354) internal successors, (4796), 17 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:01,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:01,177 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:01,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:01,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:01,385 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:03:01,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1840947061, now seen corresponding path program 3 times [2023-08-30 05:03:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:01,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012398407] [2023-08-30 05:03:01,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:03:01,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:01,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:01,387 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:01,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-08-30 05:03:02,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 05:03:02,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:03:02,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:03:02,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012398407] [2023-08-30 05:03:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012398407] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:02,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:02,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 05:03:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259088905] [2023-08-30 05:03:02,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 05:03:02,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:02,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 05:03:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 05:03:02,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-08-30 05:03:02,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 63 transitions, 396 flow. Second operand has 14 states, 14 states have (on average 315.85714285714283) internal successors, (4422), 14 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:02,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:02,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-08-30 05:03:02,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:09,439 INFO L130 PetriNetUnfolder]: 30281/44368 cut-off events. [2023-08-30 05:03:09,439 INFO L131 PetriNetUnfolder]: For 90337/90337 co-relation queries the response was YES. [2023-08-30 05:03:09,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141250 conditions, 44368 events. 30281/44368 cut-off events. For 90337/90337 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 290890 event pairs, 2611 based on Foata normal form. 1992/45644 useless extension candidates. Maximal degree in co-relation 141219. Up to 6636 conditions per place. [2023-08-30 05:03:09,966 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 238 selfloop transitions, 6 changer transitions 0/244 dead transitions. [2023-08-30 05:03:09,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 244 transitions, 2015 flow [2023-08-30 05:03:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:03:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:03:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2662 transitions. [2023-08-30 05:03:09,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447244623655914 [2023-08-30 05:03:09,968 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2662 transitions. [2023-08-30 05:03:09,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2662 transitions. [2023-08-30 05:03:09,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:09,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2662 transitions. [2023-08-30 05:03:09,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 332.75) internal successors, (2662), 8 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:09,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:09,973 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:09,973 INFO L175 Difference]: Start difference. First operand has 106 places, 63 transitions, 396 flow. Second operand 8 states and 2662 transitions. [2023-08-30 05:03:09,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 244 transitions, 2015 flow [2023-08-30 05:03:10,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 244 transitions, 1901 flow, removed 14 selfloop flow, removed 13 redundant places. [2023-08-30 05:03:10,651 INFO L231 Difference]: Finished difference. Result has 99 places, 61 transitions, 358 flow [2023-08-30 05:03:10,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=358, PETRI_PLACES=99, PETRI_TRANSITIONS=61} [2023-08-30 05:03:10,651 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-08-30 05:03:10,651 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 61 transitions, 358 flow [2023-08-30 05:03:10,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 315.85714285714283) internal successors, (4422), 14 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:10,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:10,652 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:10,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:10,853 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:03:10,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 10263789, now seen corresponding path program 3 times [2023-08-30 05:03:10,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:10,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336754497] [2023-08-30 05:03:10,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:03:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:10,855 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:10,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-08-30 05:03:11,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 05:03:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:03:12,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:03:12,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336754497] [2023-08-30 05:03:12,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336754497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:12,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:12,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 05:03:12,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047293610] [2023-08-30 05:03:12,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:12,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 05:03:12,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 05:03:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 05:03:12,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-08-30 05:03:12,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 61 transitions, 358 flow. Second operand has 14 states, 14 states have (on average 316.2857142857143) internal successors, (4428), 14 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:12,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:12,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-08-30 05:03:12,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:18,894 INFO L130 PetriNetUnfolder]: 27359/40434 cut-off events. [2023-08-30 05:03:18,894 INFO L131 PetriNetUnfolder]: For 50522/50522 co-relation queries the response was YES. [2023-08-30 05:03:19,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121418 conditions, 40434 events. 27359/40434 cut-off events. For 50522/50522 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 267522 event pairs, 675 based on Foata normal form. 1012/40786 useless extension candidates. Maximal degree in co-relation 121393. Up to 6820 conditions per place. [2023-08-30 05:03:19,300 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 228 selfloop transitions, 6 changer transitions 0/234 dead transitions. [2023-08-30 05:03:19,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 234 transitions, 1601 flow [2023-08-30 05:03:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:03:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:03:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2673 transitions. [2023-08-30 05:03:19,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490927419354839 [2023-08-30 05:03:19,303 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2673 transitions. [2023-08-30 05:03:19,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2673 transitions. [2023-08-30 05:03:19,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:19,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2673 transitions. [2023-08-30 05:03:19,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 334.125) internal successors, (2673), 8 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,309 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,309 INFO L175 Difference]: Start difference. First operand has 99 places, 61 transitions, 358 flow. Second operand 8 states and 2673 transitions. [2023-08-30 05:03:19,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 234 transitions, 1601 flow [2023-08-30 05:03:19,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 234 transitions, 1509 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-30 05:03:19,499 INFO L231 Difference]: Finished difference. Result has 92 places, 58 transitions, 314 flow [2023-08-30 05:03:19,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=92, PETRI_TRANSITIONS=58} [2023-08-30 05:03:19,499 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 27 predicate places. [2023-08-30 05:03:19,499 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 58 transitions, 314 flow [2023-08-30 05:03:19,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 316.2857142857143) internal successors, (4428), 14 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:19,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:19,500 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:19,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:19,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:19,700 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:03:19,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash 459104989, now seen corresponding path program 2 times [2023-08-30 05:03:19,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:19,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909134817] [2023-08-30 05:03:19,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:03:19,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:19,703 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:19,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-08-30 05:03:19,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:03:19,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-30 05:03:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:19,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:03:19,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:03:20,001 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-30 05:03:20,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:03:20,016 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:03:20,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:03:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-08-30 05:03:20,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:03:20,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:20,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909134817] [2023-08-30 05:03:20,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909134817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:03:20,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:03:20,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:03:20,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555720817] [2023-08-30 05:03:20,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:03:20,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:03:20,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:03:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:03:20,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 744 [2023-08-30 05:03:20,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 58 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:20,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:20,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 744 [2023-08-30 05:03:20,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:25,764 INFO L130 PetriNetUnfolder]: 25881/38296 cut-off events. [2023-08-30 05:03:25,764 INFO L131 PetriNetUnfolder]: For 34122/34122 co-relation queries the response was YES. [2023-08-30 05:03:25,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109740 conditions, 38296 events. 25881/38296 cut-off events. For 34122/34122 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 247773 event pairs, 25221 based on Foata normal form. 0/38296 useless extension candidates. Maximal degree in co-relation 109720. Up to 38278 conditions per place. [2023-08-30 05:03:26,055 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 54 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-30 05:03:26,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 57 transitions, 422 flow [2023-08-30 05:03:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:03:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:03:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1492 transitions. [2023-08-30 05:03:26,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010752688172043 [2023-08-30 05:03:26,057 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1492 transitions. [2023-08-30 05:03:26,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1492 transitions. [2023-08-30 05:03:26,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:26,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1492 transitions. [2023-08-30 05:03:26,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.4) internal successors, (1492), 5 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:26,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:26,061 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:26,061 INFO L175 Difference]: Start difference. First operand has 92 places, 58 transitions, 314 flow. Second operand 5 states and 1492 transitions. [2023-08-30 05:03:26,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 57 transitions, 422 flow [2023-08-30 05:03:26,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 57 transitions, 411 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:03:26,114 INFO L231 Difference]: Finished difference. Result has 89 places, 57 transitions, 303 flow [2023-08-30 05:03:26,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2023-08-30 05:03:26,114 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-08-30 05:03:26,115 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 303 flow [2023-08-30 05:03:26,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 294.8) internal successors, (1474), 5 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:26,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:26,115 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:26,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:26,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:26,316 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:03:26,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash 459104922, now seen corresponding path program 2 times [2023-08-30 05:03:26,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:26,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629035471] [2023-08-30 05:03:26,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:03:26,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:26,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:26,317 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:26,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-08-30 05:03:26,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:03:26,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:26,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 05:03:26,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:26,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-08-30 05:03:26,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-30 05:03:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:03:26,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-30 05:03:26,857 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 05:03:26,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-08-30 05:03:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:03:26,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:03:27,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:27,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629035471] [2023-08-30 05:03:27,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629035471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:27,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:27,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-08-30 05:03:27,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067670468] [2023-08-30 05:03:27,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:27,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 05:03:27,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:27,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 05:03:27,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-30 05:03:31,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:03:37,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:03:39,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:03:43,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:03:46,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:03:48,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 05:03:49,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 744 [2023-08-30 05:03:49,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 303 flow. Second operand has 16 states, 16 states have (on average 290.375) internal successors, (4646), 16 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:49,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:49,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 744 [2023-08-30 05:03:49,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:03:55,583 INFO L130 PetriNetUnfolder]: 30459/45082 cut-off events. [2023-08-30 05:03:55,584 INFO L131 PetriNetUnfolder]: For 37778/37778 co-relation queries the response was YES. [2023-08-30 05:03:55,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126727 conditions, 45082 events. 30459/45082 cut-off events. For 37778/37778 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 296735 event pairs, 5431 based on Foata normal form. 660/45742 useless extension candidates. Maximal degree in co-relation 126707. Up to 9002 conditions per place. [2023-08-30 05:03:56,020 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 203 selfloop transitions, 10 changer transitions 0/213 dead transitions. [2023-08-30 05:03:56,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 213 transitions, 1319 flow [2023-08-30 05:03:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 05:03:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 05:03:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3019 transitions. [2023-08-30 05:03:56,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057795698924731 [2023-08-30 05:03:56,023 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3019 transitions. [2023-08-30 05:03:56,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3019 transitions. [2023-08-30 05:03:56,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:03:56,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3019 transitions. [2023-08-30 05:03:56,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 301.9) internal successors, (3019), 10 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:56,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:56,028 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 744.0) internal successors, (8184), 11 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:56,028 INFO L175 Difference]: Start difference. First operand has 89 places, 57 transitions, 303 flow. Second operand 10 states and 3019 transitions. [2023-08-30 05:03:56,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 213 transitions, 1319 flow [2023-08-30 05:03:56,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 213 transitions, 1314 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 05:03:56,269 INFO L231 Difference]: Finished difference. Result has 97 places, 59 transitions, 343 flow [2023-08-30 05:03:56,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=343, PETRI_PLACES=97, PETRI_TRANSITIONS=59} [2023-08-30 05:03:56,270 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-08-30 05:03:56,270 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 59 transitions, 343 flow [2023-08-30 05:03:56,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 290.375) internal successors, (4646), 16 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:56,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:03:56,271 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:03:56,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2023-08-30 05:03:56,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:56,472 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:03:56,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:03:56,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1181695946, now seen corresponding path program 3 times [2023-08-30 05:03:56,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:03:56,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987532612] [2023-08-30 05:03:56,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:03:56,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:03:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:03:56,473 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:03:56,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-08-30 05:03:57,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 05:03:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:03:57,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:03:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:03:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:03:57,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:03:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:03:58,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:03:58,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987532612] [2023-08-30 05:03:58,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987532612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:03:58,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:03:58,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-08-30 05:03:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043416404] [2023-08-30 05:03:58,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:03:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 05:03:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:03:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 05:03:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 05:03:58,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 744 [2023-08-30 05:03:58,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 59 transitions, 343 flow. Second operand has 14 states, 14 states have (on average 316.42857142857144) internal successors, (4430), 14 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:03:58,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:03:58,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 744 [2023-08-30 05:03:58,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:04,275 INFO L130 PetriNetUnfolder]: 26843/40146 cut-off events. [2023-08-30 05:04:04,275 INFO L131 PetriNetUnfolder]: For 38289/38289 co-relation queries the response was YES. [2023-08-30 05:04:04,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115237 conditions, 40146 events. 26843/40146 cut-off events. For 38289/38289 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 265392 event pairs, 853 based on Foata normal form. 1320/41466 useless extension candidates. Maximal degree in co-relation 115215. Up to 6786 conditions per place. [2023-08-30 05:04:04,674 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 204 selfloop transitions, 6 changer transitions 0/210 dead transitions. [2023-08-30 05:04:04,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 210 transitions, 1307 flow [2023-08-30 05:04:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:04:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:04:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2649 transitions. [2023-08-30 05:04:04,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44506048387096775 [2023-08-30 05:04:04,676 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2649 transitions. [2023-08-30 05:04:04,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2649 transitions. [2023-08-30 05:04:04,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:04,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2649 transitions. [2023-08-30 05:04:04,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 331.125) internal successors, (2649), 8 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:04,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:04,682 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:04,682 INFO L175 Difference]: Start difference. First operand has 97 places, 59 transitions, 343 flow. Second operand 8 states and 2649 transitions. [2023-08-30 05:04:04,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 210 transitions, 1307 flow [2023-08-30 05:04:04,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 210 transitions, 1276 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-08-30 05:04:04,997 INFO L231 Difference]: Finished difference. Result has 89 places, 56 transitions, 292 flow [2023-08-30 05:04:04,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=89, PETRI_TRANSITIONS=56} [2023-08-30 05:04:04,998 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2023-08-30 05:04:04,998 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 56 transitions, 292 flow [2023-08-30 05:04:04,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 316.42857142857144) internal successors, (4430), 14 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:04,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:04:04,998 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:04:05,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2023-08-30 05:04:05,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:05,199 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:04:05,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:04:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash 573746028, now seen corresponding path program 1 times [2023-08-30 05:04:05,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:04:05,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908412950] [2023-08-30 05:04:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:04:05,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:05,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:04:05,201 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:04:05,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-08-30 05:04:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:04:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:04:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:04:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:04:05,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:04:05,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:04:05,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908412950] [2023-08-30 05:04:05,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908412950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:04:05,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:04:05,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:04:05,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089591656] [2023-08-30 05:04:05,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:04:05,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:04:05,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:04:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:04:05,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:04:05,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 744 [2023-08-30 05:04:05,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 56 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:05,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:04:05,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 744 [2023-08-30 05:04:05,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:10,653 INFO L130 PetriNetUnfolder]: 26789/40092 cut-off events. [2023-08-30 05:04:10,653 INFO L131 PetriNetUnfolder]: For 30323/30323 co-relation queries the response was YES. [2023-08-30 05:04:10,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110285 conditions, 40092 events. 26789/40092 cut-off events. For 30323/30323 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 267191 event pairs, 22285 based on Foata normal form. 54/40146 useless extension candidates. Maximal degree in co-relation 110268. Up to 33375 conditions per place. [2023-08-30 05:04:10,996 INFO L137 encePairwiseOnDemand]: 740/744 looper letters, 100 selfloop transitions, 3 changer transitions 2/105 dead transitions. [2023-08-30 05:04:10,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 105 transitions, 705 flow [2023-08-30 05:04:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:04:10,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:04:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1311 transitions. [2023-08-30 05:04:10,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405241935483871 [2023-08-30 05:04:10,998 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1311 transitions. [2023-08-30 05:04:10,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1311 transitions. [2023-08-30 05:04:10,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:10,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1311 transitions. [2023-08-30 05:04:10,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 327.75) internal successors, (1311), 4 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:11,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:11,000 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:11,000 INFO L175 Difference]: Start difference. First operand has 89 places, 56 transitions, 292 flow. Second operand 4 states and 1311 transitions. [2023-08-30 05:04:11,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 105 transitions, 705 flow [2023-08-30 05:04:11,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 105 transitions, 674 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 05:04:11,039 INFO L231 Difference]: Finished difference. Result has 88 places, 57 transitions, 297 flow [2023-08-30 05:04:11,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=88, PETRI_TRANSITIONS=57} [2023-08-30 05:04:11,040 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2023-08-30 05:04:11,040 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 57 transitions, 297 flow [2023-08-30 05:04:11,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:11,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:04:11,040 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:04:11,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2023-08-30 05:04:11,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:11,241 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:04:11,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:04:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 319626984, now seen corresponding path program 2 times [2023-08-30 05:04:11,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:04:11,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800906383] [2023-08-30 05:04:11,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:04:11,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:11,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:04:11,243 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:04:11,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2023-08-30 05:04:11,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 05:04:11,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:04:11,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 05:04:11,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:04:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:04:11,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:04:11,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:04:11,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800906383] [2023-08-30 05:04:11,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800906383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:04:11,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:04:11,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:04:11,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194456342] [2023-08-30 05:04:11,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:04:11,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:04:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:04:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:04:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:04:11,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-08-30 05:04:11,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 309.1666666666667) internal successors, (1855), 6 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:11,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:04:11,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-08-30 05:04:11,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:16,878 INFO L130 PetriNetUnfolder]: 26881/40310 cut-off events. [2023-08-30 05:04:16,878 INFO L131 PetriNetUnfolder]: For 29422/29422 co-relation queries the response was YES. [2023-08-30 05:04:17,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113255 conditions, 40310 events. 26881/40310 cut-off events. For 29422/29422 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 270812 event pairs, 20573 based on Foata normal form. 66/40376 useless extension candidates. Maximal degree in co-relation 113236. Up to 30889 conditions per place. [2023-08-30 05:04:17,215 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 147 selfloop transitions, 14 changer transitions 20/181 dead transitions. [2023-08-30 05:04:17,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 181 transitions, 1224 flow [2023-08-30 05:04:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 05:04:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 05:04:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2552 transitions. [2023-08-30 05:04:17,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-08-30 05:04:17,217 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2552 transitions. [2023-08-30 05:04:17,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2552 transitions. [2023-08-30 05:04:17,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:17,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2552 transitions. [2023-08-30 05:04:17,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 319.0) internal successors, (2552), 8 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:17,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:17,223 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 744.0) internal successors, (6696), 9 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:17,223 INFO L175 Difference]: Start difference. First operand has 88 places, 57 transitions, 297 flow. Second operand 8 states and 2552 transitions. [2023-08-30 05:04:17,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 181 transitions, 1224 flow [2023-08-30 05:04:17,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 181 transitions, 1196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 05:04:17,275 INFO L231 Difference]: Finished difference. Result has 98 places, 67 transitions, 386 flow [2023-08-30 05:04:17,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=98, PETRI_TRANSITIONS=67} [2023-08-30 05:04:17,276 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2023-08-30 05:04:17,276 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 67 transitions, 386 flow [2023-08-30 05:04:17,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 309.1666666666667) internal successors, (1855), 6 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:17,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:04:17,276 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:04:17,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2023-08-30 05:04:17,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:17,478 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:04:17,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:04:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 311245542, now seen corresponding path program 3 times [2023-08-30 05:04:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:04:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81631729] [2023-08-30 05:04:17,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:04:17,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:17,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:04:17,480 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:04:17,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2023-08-30 05:04:17,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-30 05:04:17,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:04:17,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:04:17,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:04:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:04:17,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:04:17,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:04:17,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81631729] [2023-08-30 05:04:17,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81631729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:04:17,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:04:17,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 05:04:17,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436033431] [2023-08-30 05:04:17,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:04:17,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:04:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:04:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:04:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:04:17,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 744 [2023-08-30 05:04:17,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 67 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 317.25) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:17,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:04:17,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 744 [2023-08-30 05:04:17,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:23,426 INFO L130 PetriNetUnfolder]: 26729/39996 cut-off events. [2023-08-30 05:04:23,426 INFO L131 PetriNetUnfolder]: For 63103/63103 co-relation queries the response was YES. [2023-08-30 05:04:23,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140274 conditions, 39996 events. 26729/39996 cut-off events. For 63103/63103 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 265820 event pairs, 22561 based on Foata normal form. 36/40032 useless extension candidates. Maximal degree in co-relation 140250. Up to 34077 conditions per place. [2023-08-30 05:04:24,030 INFO L137 encePairwiseOnDemand]: 741/744 looper letters, 81 selfloop transitions, 5 changer transitions 7/93 dead transitions. [2023-08-30 05:04:24,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 708 flow [2023-08-30 05:04:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 05:04:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 05:04:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-08-30 05:04:24,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4390681003584229 [2023-08-30 05:04:24,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-08-30 05:04:24,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-08-30 05:04:24,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:24,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-08-30 05:04:24,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:24,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:24,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 744.0) internal successors, (2976), 4 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:24,034 INFO L175 Difference]: Start difference. First operand has 98 places, 67 transitions, 386 flow. Second operand 3 states and 980 transitions. [2023-08-30 05:04:24,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 708 flow [2023-08-30 05:04:24,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 93 transitions, 689 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 05:04:24,234 INFO L231 Difference]: Finished difference. Result has 97 places, 64 transitions, 370 flow [2023-08-30 05:04:24,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=97, PETRI_TRANSITIONS=64} [2023-08-30 05:04:24,235 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2023-08-30 05:04:24,235 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 64 transitions, 370 flow [2023-08-30 05:04:24,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.25) internal successors, (1269), 4 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:24,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:04:24,236 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:04:24,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2023-08-30 05:04:24,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:24,437 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:04:24,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:04:24,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1471168857, now seen corresponding path program 1 times [2023-08-30 05:04:24,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:04:24,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310780870] [2023-08-30 05:04:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:04:24,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:24,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:04:24,439 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:04:24,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-08-30 05:04:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:04:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:04:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:04:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:04:24,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:04:24,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:04:24,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310780870] [2023-08-30 05:04:24,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310780870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:04:24,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:04:24,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:04:24,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975136837] [2023-08-30 05:04:24,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:04:24,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:04:24,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:04:24,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:04:24,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:04:24,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 744 [2023-08-30 05:04:24,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 64 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:24,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:04:24,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 744 [2023-08-30 05:04:24,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:30,099 INFO L130 PetriNetUnfolder]: 25719/38456 cut-off events. [2023-08-30 05:04:30,099 INFO L131 PetriNetUnfolder]: For 70206/70206 co-relation queries the response was YES. [2023-08-30 05:04:30,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135212 conditions, 38456 events. 25719/38456 cut-off events. For 70206/70206 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 253404 event pairs, 20359 based on Foata normal form. 442/38898 useless extension candidates. Maximal degree in co-relation 135187. Up to 30791 conditions per place. [2023-08-30 05:04:30,525 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 123 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2023-08-30 05:04:30,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 128 transitions, 973 flow [2023-08-30 05:04:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:04:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:04:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1305 transitions. [2023-08-30 05:04:30,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43850806451612906 [2023-08-30 05:04:30,527 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1305 transitions. [2023-08-30 05:04:30,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1305 transitions. [2023-08-30 05:04:30,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:30,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1305 transitions. [2023-08-30 05:04:30,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.25) internal successors, (1305), 4 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:30,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:30,531 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:30,531 INFO L175 Difference]: Start difference. First operand has 97 places, 64 transitions, 370 flow. Second operand 4 states and 1305 transitions. [2023-08-30 05:04:30,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 128 transitions, 973 flow [2023-08-30 05:04:30,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 924 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-30 05:04:30,746 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 404 flow [2023-08-30 05:04:30,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=99, PETRI_TRANSITIONS=67} [2023-08-30 05:04:30,746 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2023-08-30 05:04:30,746 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 404 flow [2023-08-30 05:04:30,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 316.5) internal successors, (1266), 4 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:30,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:04:30,746 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:04:30,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2023-08-30 05:04:30,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:30,947 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:04:30,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:04:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash 720234385, now seen corresponding path program 2 times [2023-08-30 05:04:30,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:04:30,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645457721] [2023-08-30 05:04:30,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:04:30,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:30,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:04:30,949 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:04:30,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2023-08-30 05:04:31,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:04:31,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:04:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 05:04:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:04:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:04:31,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:04:31,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:04:31,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645457721] [2023-08-30 05:04:31,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645457721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:04:31,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:04:31,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 05:04:31,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263594929] [2023-08-30 05:04:31,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:04:31,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 05:04:31,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:04:31,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 05:04:31,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 05:04:31,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 744 [2023-08-30 05:04:31,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 67 transitions, 404 flow. Second operand has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:31,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:04:31,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 744 [2023-08-30 05:04:31,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:36,798 INFO L130 PetriNetUnfolder]: 24833/36958 cut-off events. [2023-08-30 05:04:36,798 INFO L131 PetriNetUnfolder]: For 68783/68783 co-relation queries the response was YES. [2023-08-30 05:04:37,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133183 conditions, 36958 events. 24833/36958 cut-off events. For 68783/68783 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 245539 event pairs, 1455 based on Foata normal form. 442/37400 useless extension candidates. Maximal degree in co-relation 133157. Up to 32584 conditions per place. [2023-08-30 05:04:37,134 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 105 selfloop transitions, 8 changer transitions 1/114 dead transitions. [2023-08-30 05:04:37,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 114 transitions, 872 flow [2023-08-30 05:04:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 05:04:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 05:04:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2023-08-30 05:04:37,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361559139784946 [2023-08-30 05:04:37,136 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2023-08-30 05:04:37,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2023-08-30 05:04:37,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:37,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2023-08-30 05:04:37,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:37,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:37,138 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 744.0) internal successors, (3720), 5 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:37,138 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 404 flow. Second operand 4 states and 1298 transitions. [2023-08-30 05:04:37,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 114 transitions, 872 flow [2023-08-30 05:04:37,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 114 transitions, 859 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 05:04:37,344 INFO L231 Difference]: Finished difference. Result has 103 places, 68 transitions, 434 flow [2023-08-30 05:04:37,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=434, PETRI_PLACES=103, PETRI_TRANSITIONS=68} [2023-08-30 05:04:37,345 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 38 predicate places. [2023-08-30 05:04:37,345 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 68 transitions, 434 flow [2023-08-30 05:04:37,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 317.5) internal successors, (1270), 4 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:37,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:04:37,345 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:04:37,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2023-08-30 05:04:37,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:37,546 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:04:37,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:04:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1444990752, now seen corresponding path program 1 times [2023-08-30 05:04:37,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:04:37,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737068753] [2023-08-30 05:04:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:04:37,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:37,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:04:37,552 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:04:37,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2023-08-30 05:04:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:04:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:04:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:04:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 05:04:37,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:04:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 05:04:38,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:04:38,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737068753] [2023-08-30 05:04:38,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737068753] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 05:04:38,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 05:04:38,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-08-30 05:04:38,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949748700] [2023-08-30 05:04:38,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:04:38,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:04:38,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:04:38,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:04:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 05:04:38,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-08-30 05:04:38,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 68 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:38,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:04:38,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-08-30 05:04:38,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:43,369 INFO L130 PetriNetUnfolder]: 25855/38408 cut-off events. [2023-08-30 05:04:43,370 INFO L131 PetriNetUnfolder]: For 80860/80860 co-relation queries the response was YES. [2023-08-30 05:04:43,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139016 conditions, 38408 events. 25855/38408 cut-off events. For 80860/80860 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 250308 event pairs, 1644 based on Foata normal form. 480/38888 useless extension candidates. Maximal degree in co-relation 138988. Up to 21388 conditions per place. [2023-08-30 05:04:43,806 INFO L137 encePairwiseOnDemand]: 736/744 looper letters, 139 selfloop transitions, 34 changer transitions 1/174 dead transitions. [2023-08-30 05:04:43,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 1425 flow [2023-08-30 05:04:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:04:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:04:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2235 transitions. [2023-08-30 05:04:43,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42914746543778803 [2023-08-30 05:04:43,808 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2235 transitions. [2023-08-30 05:04:43,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2235 transitions. [2023-08-30 05:04:43,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:43,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2235 transitions. [2023-08-30 05:04:43,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.2857142857143) internal successors, (2235), 7 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:43,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:43,813 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:43,813 INFO L175 Difference]: Start difference. First operand has 103 places, 68 transitions, 434 flow. Second operand 7 states and 2235 transitions. [2023-08-30 05:04:43,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 1425 flow [2023-08-30 05:04:44,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 174 transitions, 1369 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 05:04:44,007 INFO L231 Difference]: Finished difference. Result has 106 places, 88 transitions, 641 flow [2023-08-30 05:04:44,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=641, PETRI_PLACES=106, PETRI_TRANSITIONS=88} [2023-08-30 05:04:44,007 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-08-30 05:04:44,008 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 88 transitions, 641 flow [2023-08-30 05:04:44,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:44,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:04:44,008 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:04:44,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2023-08-30 05:04:44,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:44,209 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:04:44,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:04:44,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1307024864, now seen corresponding path program 2 times [2023-08-30 05:04:44,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:04:44,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790094073] [2023-08-30 05:04:44,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 05:04:44,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:44,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:04:44,211 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:04:44,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-08-30 05:04:44,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 05:04:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:04:44,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:04:44,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:04:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:04:44,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:04:44,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:04:44,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790094073] [2023-08-30 05:04:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790094073] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:04:44,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:04:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:04:44,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521089756] [2023-08-30 05:04:44,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:04:44,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 05:04:44,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:04:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 05:04:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 05:04:44,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 744 [2023-08-30 05:04:44,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 88 transitions, 641 flow. Second operand has 6 states, 6 states have (on average 310.6666666666667) internal successors, (1864), 6 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:44,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:04:44,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 744 [2023-08-30 05:04:44,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:50,544 INFO L130 PetriNetUnfolder]: 26896/40208 cut-off events. [2023-08-30 05:04:50,544 INFO L131 PetriNetUnfolder]: For 108949/108949 co-relation queries the response was YES. [2023-08-30 05:04:50,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158786 conditions, 40208 events. 26896/40208 cut-off events. For 108949/108949 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 262440 event pairs, 5017 based on Foata normal form. 25/40233 useless extension candidates. Maximal degree in co-relation 158758. Up to 29393 conditions per place. [2023-08-30 05:04:51,016 INFO L137 encePairwiseOnDemand]: 737/744 looper letters, 140 selfloop transitions, 15 changer transitions 40/195 dead transitions. [2023-08-30 05:04:51,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 195 transitions, 1598 flow [2023-08-30 05:04:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 05:04:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 05:04:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2237 transitions. [2023-08-30 05:04:51,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429531490015361 [2023-08-30 05:04:51,018 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2237 transitions. [2023-08-30 05:04:51,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2237 transitions. [2023-08-30 05:04:51,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:51,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2237 transitions. [2023-08-30 05:04:51,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.57142857142856) internal successors, (2237), 7 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:51,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:51,022 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 744.0) internal successors, (5952), 8 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:51,022 INFO L175 Difference]: Start difference. First operand has 106 places, 88 transitions, 641 flow. Second operand 7 states and 2237 transitions. [2023-08-30 05:04:51,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 195 transitions, 1598 flow [2023-08-30 05:04:52,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 195 transitions, 1596 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 05:04:52,357 INFO L231 Difference]: Finished difference. Result has 115 places, 91 transitions, 709 flow [2023-08-30 05:04:52,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=709, PETRI_PLACES=115, PETRI_TRANSITIONS=91} [2023-08-30 05:04:52,358 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 50 predicate places. [2023-08-30 05:04:52,358 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 91 transitions, 709 flow [2023-08-30 05:04:52,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 310.6666666666667) internal successors, (1864), 6 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:52,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:04:52,358 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:04:52,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2023-08-30 05:04:52,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:52,559 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:04:52,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:04:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash 318732388, now seen corresponding path program 3 times [2023-08-30 05:04:52,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:04:52,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568511485] [2023-08-30 05:04:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 05:04:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:04:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:04:52,561 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:04:52,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2023-08-30 05:04:52,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 05:04:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:04:52,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 05:04:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:04:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 05:04:52,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:04:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 05:04:53,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:04:53,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568511485] [2023-08-30 05:04:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568511485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 05:04:53,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 05:04:53,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-08-30 05:04:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350799240] [2023-08-30 05:04:53,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 05:04:53,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 05:04:53,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:04:53,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 05:04:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 05:04:53,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 744 [2023-08-30 05:04:53,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 91 transitions, 709 flow. Second operand has 9 states, 9 states have (on average 309.1111111111111) internal successors, (2782), 9 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:53,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:04:53,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 744 [2023-08-30 05:04:53,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:04:59,387 INFO L130 PetriNetUnfolder]: 28335/42069 cut-off events. [2023-08-30 05:04:59,387 INFO L131 PetriNetUnfolder]: For 122933/122933 co-relation queries the response was YES. [2023-08-30 05:04:59,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168133 conditions, 42069 events. 28335/42069 cut-off events. For 122933/122933 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 272676 event pairs, 4533 based on Foata normal form. 25/42094 useless extension candidates. Maximal degree in co-relation 168101. Up to 21409 conditions per place. [2023-08-30 05:04:59,790 INFO L137 encePairwiseOnDemand]: 736/744 looper letters, 174 selfloop transitions, 38 changer transitions 23/235 dead transitions. [2023-08-30 05:04:59,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 235 transitions, 1940 flow [2023-08-30 05:04:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 05:04:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 05:04:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2863 transitions. [2023-08-30 05:04:59,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42756869772998807 [2023-08-30 05:04:59,793 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2863 transitions. [2023-08-30 05:04:59,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2863 transitions. [2023-08-30 05:04:59,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:04:59,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2863 transitions. [2023-08-30 05:04:59,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 318.1111111111111) internal successors, (2863), 9 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:59,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 744.0) internal successors, (7440), 10 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:59,800 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 744.0) internal successors, (7440), 10 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:04:59,800 INFO L175 Difference]: Start difference. First operand has 115 places, 91 transitions, 709 flow. Second operand 9 states and 2863 transitions. [2023-08-30 05:04:59,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 235 transitions, 1940 flow [2023-08-30 05:05:01,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 235 transitions, 1922 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-30 05:05:01,402 INFO L231 Difference]: Finished difference. Result has 119 places, 96 transitions, 819 flow [2023-08-30 05:05:01,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=819, PETRI_PLACES=119, PETRI_TRANSITIONS=96} [2023-08-30 05:05:01,403 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 54 predicate places. [2023-08-30 05:05:01,403 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 96 transitions, 819 flow [2023-08-30 05:05:01,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 309.1111111111111) internal successors, (2782), 9 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:01,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:05:01,403 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:05:01,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2023-08-30 05:05:01,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:05:01,604 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:05:01,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:05:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash 909564122, now seen corresponding path program 4 times [2023-08-30 05:05:01,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:05:01,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056300736] [2023-08-30 05:05:01,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 05:05:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:05:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:05:01,606 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:05:01,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2023-08-30 05:05:02,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 05:05:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:05:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:05:02,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:05:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 05:05:02,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:05:02,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:05:02,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056300736] [2023-08-30 05:05:02,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056300736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:05:02,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:05:02,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:05:02,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896442074] [2023-08-30 05:05:02,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:05:02,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:05:02,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:05:02,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:05:02,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:05:02,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 744 [2023-08-30 05:05:02,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 96 transitions, 819 flow. Second operand has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:02,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:05:02,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 744 [2023-08-30 05:05:02,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:05:08,486 INFO L130 PetriNetUnfolder]: 27765/41374 cut-off events. [2023-08-30 05:05:08,486 INFO L131 PetriNetUnfolder]: For 147583/147583 co-relation queries the response was YES. [2023-08-30 05:05:08,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175011 conditions, 41374 events. 27765/41374 cut-off events. For 147583/147583 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 271022 event pairs, 18715 based on Foata normal form. 480/41854 useless extension candidates. Maximal degree in co-relation 174979. Up to 34131 conditions per place. [2023-08-30 05:05:08,941 INFO L137 encePairwiseOnDemand]: 738/744 looper letters, 151 selfloop transitions, 16 changer transitions 1/168 dead transitions. [2023-08-30 05:05:08,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 168 transitions, 1555 flow [2023-08-30 05:05:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 05:05:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 05:05:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1923 transitions. [2023-08-30 05:05:08,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307795698924731 [2023-08-30 05:05:08,943 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1923 transitions. [2023-08-30 05:05:08,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1923 transitions. [2023-08-30 05:05:08,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:05:08,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1923 transitions. [2023-08-30 05:05:08,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:08,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:08,946 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 744.0) internal successors, (5208), 7 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:08,946 INFO L175 Difference]: Start difference. First operand has 119 places, 96 transitions, 819 flow. Second operand 6 states and 1923 transitions. [2023-08-30 05:05:08,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 168 transitions, 1555 flow [2023-08-30 05:05:10,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 168 transitions, 1515 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 05:05:10,424 INFO L231 Difference]: Finished difference. Result has 120 places, 96 transitions, 824 flow [2023-08-30 05:05:10,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=824, PETRI_PLACES=120, PETRI_TRANSITIONS=96} [2023-08-30 05:05:10,425 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 55 predicate places. [2023-08-30 05:05:10,425 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 96 transitions, 824 flow [2023-08-30 05:05:10,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.6) internal successors, (1563), 5 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:10,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:05:10,425 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:05:10,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2023-08-30 05:05:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:05:10,626 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:05:10,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:05:10,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1696100410, now seen corresponding path program 5 times [2023-08-30 05:05:10,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:05:10,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035493097] [2023-08-30 05:05:10,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 05:05:10,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:05:10,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:05:10,630 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:05:10,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-08-30 05:05:11,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 05:05:11,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 05:05:11,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 05:05:11,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:05:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-30 05:05:11,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 05:05:11,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 05:05:11,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035493097] [2023-08-30 05:05:11,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035493097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:05:11,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:05:11,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 05:05:11,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898421717] [2023-08-30 05:05:11,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:05:11,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 05:05:11,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 05:05:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 05:05:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 05:05:11,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 744 [2023-08-30 05:05:11,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 96 transitions, 824 flow. Second operand has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:11,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:05:11,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 744 [2023-08-30 05:05:11,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:05:17,566 INFO L130 PetriNetUnfolder]: 26876/39759 cut-off events. [2023-08-30 05:05:17,566 INFO L131 PetriNetUnfolder]: For 137167/137167 co-relation queries the response was YES. [2023-08-30 05:05:17,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170608 conditions, 39759 events. 26876/39759 cut-off events. For 137167/137167 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 254325 event pairs, 19800 based on Foata normal form. 58/39817 useless extension candidates. Maximal degree in co-relation 170575. Up to 36636 conditions per place. [2023-08-30 05:05:18,052 INFO L137 encePairwiseOnDemand]: 739/744 looper letters, 113 selfloop transitions, 13 changer transitions 17/143 dead transitions. [2023-08-30 05:05:18,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 143 transitions, 1369 flow [2023-08-30 05:05:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 05:05:18,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 05:05:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1605 transitions. [2023-08-30 05:05:18,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2023-08-30 05:05:18,054 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1605 transitions. [2023-08-30 05:05:18,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1605 transitions. [2023-08-30 05:05:18,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:05:18,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1605 transitions. [2023-08-30 05:05:18,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:18,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:18,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 744.0) internal successors, (4464), 6 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:18,057 INFO L175 Difference]: Start difference. First operand has 120 places, 96 transitions, 824 flow. Second operand 5 states and 1605 transitions. [2023-08-30 05:05:18,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 143 transitions, 1369 flow [2023-08-30 05:05:19,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 143 transitions, 1321 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 05:05:19,571 INFO L231 Difference]: Finished difference. Result has 119 places, 94 transitions, 784 flow [2023-08-30 05:05:19,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=744, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=784, PETRI_PLACES=119, PETRI_TRANSITIONS=94} [2023-08-30 05:05:19,572 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 54 predicate places. [2023-08-30 05:05:19,572 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 94 transitions, 784 flow [2023-08-30 05:05:19,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 313.6) internal successors, (1568), 5 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:05:19,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:05:19,573 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 05:05:19,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2023-08-30 05:05:19,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:05:19,781 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-30 05:05:19,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:05:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash -118222908, now seen corresponding path program 1 times [2023-08-30 05:05:19,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 05:05:19,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430277319] [2023-08-30 05:05:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:05:19,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 05:05:19,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 05:05:19,783 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 05:05:19,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2023-08-30 05:05:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:05:20,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-30 05:05:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 05:05:20,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2023-08-30 05:05:21,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 05:05:21,502 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 05:05:21,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 85 [2023-08-30 05:05:25,665 INFO L321 Elim1Store]: treesize reduction 28, result has 71.1 percent of original size [2023-08-30 05:05:25,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 7 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 54 case distinctions, treesize of input 469 treesize of output 249 [2023-08-30 05:05:35,188 WARN L222 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 90 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 05:05:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-30 05:05:45,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 05:06:47,201 WARN L222 SmtUtils]: Spent 33.27s on a formula simplification. DAG size of input: 805 DAG size of output: 701 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-08-30 05:06:47,204 INFO L321 Elim1Store]: treesize reduction 345, result has 89.0 percent of original size [2023-08-30 05:06:47,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 2239 treesize of output 4152 [2023-08-30 05:06:48,388 INFO L217 Elim1Store]: Index analysis took 444 ms [2023-08-30 05:06:50,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:06:50,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 1333 treesize of output 1552 [2023-08-30 05:06:51,796 INFO L217 Elim1Store]: Index analysis took 484 ms [2023-08-30 05:06:54,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 05:06:54,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 1095 treesize of output 1328 Killed by 15